I have a problem for v0.85 : it is freezing!

[ThUnDeRbOlTx]

Firstly, I ınstalled Project Reality v0.85 (maps and core) and I played. It didn't freeze.
Then I wanted to play singleplayer. Then I installed PRSP 0.85. I opened the game... While the game is loading, I am waiting, waiting and waiting.... Then the game opened. I played it. But it's freezing.In fact I didn't played. When I heard weapons sound or another sound , it's freezing.

Please Help me...


Thanks

EDIT: my system requirements

ATI RADEON 9600 DİRECTx 9.0
INTEL PENTIUM 4
1 GB RAM
WINDOWS XP SP2

[Ray454]

try updateing to sp3 and updating your vid drivers gl.