Vista Lashkar Valley problems

[Krisu]

This is my only map I've tried so I don't know is it map specific or overall problem.

First time when I played it it crashed after mapload without error message.

Second time I get into game but all of my textures where bugging (those actually get back to normal after 1 min). My fps was really low (and also sounds worked same "rythm" with frames). I didn't check it out but I think it was something like 5 or even lower. Then I started to try play and joined squad. I moved and then it crashed with memory error. I didn't take pic, but it was like other memory errors posted here and number started with 5.

Third and fourth time this happened:

I was unable to do anything and game crashed after pressing PrtScr-button.

Specs.
Vista 32bit
AMD Phenom 9550 Quad-Core
ATI Radeon HD 3580
4gb memory