Firstly, the video would have been better slowed down at least 50% - way too fast. And audio would have helped too.

I uploaded the file via FTP and unzipped. Verified the folder was there. Went to browser and put in www.domainname.com/freichat/ and got a 500 error. Appended installation/install.php to the end and got the same error. All Freichat directories are set at 777.

Have i missed something? This is the latest version downloaded today on a Joomla! 1.5.26. Also using CB 1.8.

It is a problem due to permissions .

All freichat folders , sub folders and files should have permissions 0755 and not 0777

Except for the files arg.php and config.dat in freichat folder .

i tried to install freichat, all files has permission 755.
i tried to set freichat folder (just the folder) and arg.php file to 777 too.

not works yet

any help?

Can you try deleting the file .htaccess in freichat directory ?