System hangs after capturing a settlement

[last_assassin]

I'm playing as the solanki rajputs, i have captured all the cities of the Khwarizm shah except the last one (kiva). I have an all stared general whose army is a little smaller than that of the army in the city. Here's my problem after I defeat the army at kiva with a heroic victory the system hangs.
I also bribed a general named Iskander(not sure about the spelling) near the black sea where he and is army were standing, but he and his whole army refuse to move for more than 8 turns now!!!!

Plzzzzz help
thanks
Last Assassin

[SoulBlade]

Post your save.