game.dat error in the middle of the game

helo everyone. i just successfully install the rj_rotwk mod 1.05.06.. i follw the instruction carefully but there is a serious problem.. at the middle of the game especially when i played arnor, the dunedein warrior is invincible, only their shield is visible.. then at the middle of the game,it suddenly stop with a message that the game.dat encountered a problem and must be closed. please help me find what is the reason behind and how will i solved this problem.. the games was so near perfect.. i love it but i couldn't play it longer.. please send me through my email blixblutzie21@yahoo.com.. i badly needed your help guys..

thank you..

zygox