siege ctd

[philosophos]

Hi! I made a new thread for this.
In most siege battles with muslim nations I face a ctd. It says "Medieval 2 Total War face an unspecified error and has to be closed" or something like this.
I play as Byzantines in early era campaign and with SS 6.4 mod.
The sieges with western catholic nations have no problem.
I use a steam version of the game. Windows 7 64bit, 8gb RAM, 3.1 Ghz i5, gforce 1gb.
( I have installed the "really bad AI" sub mod but no difference )

[InsaneAbacus]

Did you install the submod BEFORE or AFTER you got the problem?

[Vissewalde rex de Gerzika]

You need to start a new campaign for it to take effect IIRC.