how do i add a file extension like a word document in the backend???

Go to http://your_site.com/freichat/administrator to access the backend Click on _file_send in the left Menu Add a mime type separated by comma for eg. <table align="center" border="1" cellpadding="0" cellspacing="0" style="border: medium none ; border-collapse: collapse;" width="500"> <tbody> <tr style=""> <td bgcolor="#efefef none repeat scroll 0% 0%" style="border-style: solid; border-color: black border-width: 1pt; padding: 0in 5.4pt; background: #efefef none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; width: 49.1pt;" valign="top" width="65"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <strong><font face="Calibri">Extension</font></strong></p> </td> <td bgcolor="#efefef none repeat scroll 0% 0%" style="border-style: solid solid solid none; border-color: black border-width: 1pt 1pt 1pt medium; padding: 0in 5.4pt; background: #efefef none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; width: 5.5in;" valign="top" width="528"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <strong><font face="Calibri">MIME Type</font></strong></p> </td> </tr> <tr style=""> <td style="border-style: none solid solid; border-color: black border-width: medium 1pt 1pt; padding: 0in 5.4pt; width: 49.1pt; background-color: transparent;" valign="top" width="65"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <font face="Calibri">   .doc</font></p> </td> <td style="border-style: none solid solid none; border-color: black border-width: medium 1pt 1pt medium; padding: 0in 5.4pt; width: 5.5in; background-color: transparent;" valign="top" width="528"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <font face="Calibri">application/msword</font></p> </td> </tr> <tr style=""> <td style="border-style: none solid solid; border-color: black border-width: medium 1pt 1pt; padding: 0in 5.4pt; width: 49.1pt; background-color: transparent;" valign="top" width="65"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <font face="Calibri">   .dot</font></p> </td> <td style="border-style: none solid solid none; border-color: black border-width: medium 1pt 1pt medium; padding: 0in 5.4pt; width: 5.5in; background-color: transparent;" valign="top" width="528"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <font face="Calibri">application/msword</font></p> </td> </tr> <tr style=""> <td style="border-style: none solid solid; border-color: black border-width: medium 1pt 1pt; padding: 0in 5.4pt; width: 49.1pt; background-color: transparent;" valign="top" width="65"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">   .xlsg</font></span></p> </td> <td style="border-style: none solid solid none; border-color: black border-width: medium 1pt 1pt medium; padding: 0in 5.4pt; width: 5.5in; background-color: transparent;" valign="top" width="528"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">application/vnd.ms-excel</font></span></p> </td> </tr> <tr style=""> <td style="border-style: none solid solid; border-color: black border-width: medium 1pt 1pt; padding: 0in 5.4pt; width: 49.1pt; background-color: transparent;" valign="top" width="65"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">   .xlt</font></span></p> </td> <td style="border-style: none solid solid none; border-color: black border-width: medium 1pt 1pt medium; padding: 0in 5.4pt; width: 5.5in; background-color: transparent;" valign="top" width="528"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">application/vnd.ms-excel</font></span></p> </td> </tr> <tr style=""> <td style="border-style: none solid solid; border-color: black border-width: medium 1pt 1pt; padding: 0in 5.4pt; width: 49.1pt; background-color: transparent;" valign="top" width="65"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">   .xla</font></span></p> </td> <td style="border-style: none solid solid none; border-color: black border-width: medium 1pt 1pt medium; padding: 0in 5.4pt; width: 5.5in; background-color: transparent;" valign="top" width="528"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">application/vnd.ms-excel</font></span></p> </td> </tr> <tr style=""> <td style="border-style: none solid solid; border-color: black border-width: medium 1pt 1pt; padding: 0in 5.4pt; width: 49.1pt; background-color: transparent;" valign="top" width="65"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">   .ppt</font></span></p> </td> <td style="border-style: none solid solid none; border-color: black border-width: medium 1pt 1pt medium; padding: 0in 5.4pt; width: 5.5in; background-color: transparent;" valign="top" width="528"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">application/vnd.ms-powerpoint</font></span></p> </td> </tr> <tr style=""> <td style="border-style: none solid solid; border-color: black border-width: medium 1pt 1pt; padding: 0in 5.4pt; width: 49.1pt; background-color: transparent;" valign="top" width="65"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">   .pot</font></span></p> </td> <td style="border-style: none solid solid none; border-color: black border-width: medium 1pt 1pt medium; padding: 0in 5.4pt; width: 5.5in; background-color: transparent;" valign="top" width="528"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">application/vnd.ms-powerpoint</font></span></p> </td> </tr> <tr style=""> <td style="border-style: none solid solid; border-color: black border-width: medium 1pt 1pt; padding: 0in 5.4pt; width: 49.1pt; background-color: transparent;" valign="top" width="65"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">   .pps</font></span></p> </td> <td style="border-style: none solid solid none; border-color: black border-width: medium 1pt 1pt medium; padding: 0in 5.4pt; width: 5.5in; background-color: transparent;" valign="top" width="528"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">application/vnd.ms-powerpoint/font></font></span></p> </td> </tr> <tr style=""> <td style="border-style: none solid solid; border-color: black border-width: medium 1pt 1pt; padding: 0in 5.4pt; width: 49.1pt; background-color: transparent;" valign="top" width="65"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">   .ppa</font></span></p> </td> <td style="border-style: none solid solid none; border-color: black border-width: medium 1pt 1pt medium; padding: 0in 5.4pt; width: 5.5in; background-color: transparent;" valign="top" width="528"> <p style="margin: 0in 0in 0pt; line-height: normal;"> <span style="font-size:16px;"><font face="Calibri">application/vnd.ms-powerpoint</font></span></p> </td> </tr> </tbody> </table> You can search for more extensions in google , and add them according to your choice