auth.php3 error

[alphasigns]

After upgrading to Plesk 7.6 I had several problems, some could be fixed. My biggest problem is that I cannot login into my Plesk Control Panel. Virtuozzo or RDP are no problem.
When I try to open PCP I get following error message:

Warning: Unexpected character in input: ' in C:\Program Files\SWsoft\Plesk\admin\auto_prepend\auth.php3 on line 77

Warning: Unexpected character in input: '' (ASCII=26) state=1 in C:\Program Files\SWsoft\Plesk\admin\auto_prepend\auth.php3 on line 77

Parse error: parse error, unexpected T_STRING in C:\Program Files\SWsoft\Plesk\admin\auto_prepend\auth.php3 on line 77

Anyone any suggestions on this?
Many thanks.

 

[Traged1]

We are also getting reports when clients are installing php Application from the Application Vault such as Mambo:

Parse error: parse error, unexpected T_STRING in C:\Inetpub\vhosts\domain.com\httpdocs\mambo\configuration.php on line 11


How do we fix this? Anyone know?