Trees don't let me pass throught Fell wood :(

[lahalehey]

game freezes when i killed last treant. then, a way should be opened at north to go to cold marshes but it's not opening ! nothing happens

i loaded another save but situation is same.here is a screenshot,http://img75.imageshack.us/img75/1987/asdnd0.jpg

when i run game at first time it gives an error message : an assertion failed in InfGame.cpp at line number 2608. Programmer says: problems removing files from Temp directory,delete the directory and try again

but it doesn't show up when i try to run game again..also,i tried to delete Temp directory but it didn't help to main problem..

[Fomalhaut]

Don't delete the Temp. It happened to me too, sorry, but you'll have to reinstall the game...

It helped when I reinstalled it in complete mode, not recommended. It worked fine then.