Crashing after every map change(siege only)

[maker]

Hi
Just like the title says, on almost every siege map change I get the "warband has stopped working" error. This happens with just native crpg and with mods. I recently reformatted my computer and reinstalled warband and crpg and it still happens.
specs:
Intel Core 2 Duo CPU E6850 @ 3.00GHz
4GB Ram
9800 gtx +
and I'm running windows 7 32 bit
Any help would be appreciated

[Spartacus]

Did you try putting down the video settings?