PFC beta 10 with php 5.0.4 (plesk) not working

[phew]

Hello,

I tried to install PFC on a box running PHP 5.0.4 (Plesk 8.1).
It says "Loading" but never finishes. Tried it on 2 boxes, same problem.

First it gave me an error that it can't write to data/private/chat/sXXXXXXXX
I fixed that manually (User was apache and not the real one (don't know why the user of this dir was different from the others....)


I also tried running the setup.php but it fails with a parse error.
"unexpected T_STRING in /....../phpfreechat-1.0-beta10-setup.php on line 35"

How can I fix these problems and make it run?

Thank you!