output latencey

ok im running windows xp i have 556 ram pentium 3 and a soundblaster card
my tracks are not coming out right.nuting is coming out timed right.the first few notes r right then it gets worse and worse and by the end of the song the tracks are totaly off.
i had this problem once befor and someone told me how to fix it but i forgot so i know its not the computer because it has worked for me befor but something is off in the buffering or something
please help if you have any idea what i could try to fix this

your soundblaster is only accurate when N is set (in prefs) to record and playback at 48000hz at 44000 you will get random drift -

Dr J