PHP Fatal error: Call to a member function property() on a non-object

Hi guys!

Installed MODx 0.9.6.3
Installation was succesful.
The when I try to enter to manager panel through the safari it shows:
PHP Fatal error: Call to a member function property() on a non-object in \\PDC1\sites\f\fridaycat.com\public_html\fridaycat\manager\frames\1.php on line 4

Whe try to enter through the IE, it shows: HTTP 500 Internal Server Error

How can I fix this?
Thanx!

Try uploading the manager files again. Sounds like a corrupted upload.