FTP Login Problem after Backup restoring....

[TrippleEx]

Hi,

i reinstall my Rootserver and install a fresh version of ispCP.
Befor i do this, i download the vHost Backup to my local machine.
After the installation i upload the both Backup via FTP to the Backupfolder. I give both Files chmod 650.

After restoring User Backups over ispCP "Restor Backup", user can't loggin with their FTP Account now.

I try change the FTP Account Password, and i try readding a new FTP Account, but nothin change, the user can't login.!!!!

Iam looking via SSH to the /vhost/../htdocs/ Folder, and checkup the mySQL Tables via myphpAdmin, the files ind Folder and tables in the DB are avalible. But there is Blank Page (on .php) the .html works.

Server:
Debian Etch 4, with ispCP 1.0.0 rc4.
http://www.kocubaba.com/index.htm --> works
http://www.kocubaba.com/portal.php --> didn't work

What is worng...???