Mrq.Swe

i have a problem with QTpro v4.51b (think it is) Lets say when a customer buys an product with the atrib. size. the products stock get changed but not the atrib size for that product. ive tried to overwrite my files with the QTpro files. and still nothing. I know theres alot of ppl that have had the same problem as me in this therad but i cant find any solution for this. any thoughts ? / H