thx for info ibeam. i worked it out somehow
but it occured that my computer is not good enough to render 550frames of animation this way...or i did sth to corrupt the file. i wanted to give it a shot what RedStar was talking about but the car renders once....after i change sth and try to render again max crashes. i was wondering can this be caused by the fact that my car is build of 5 elements? i mean that there are 4 wheels and the body and every part is attached to it...so it's kinda one object.i used multi/sub material and there are like 15 different materials in it. if anyone have any idea what is this about i will be greatfull for posting