Help with tracks speeding up!

[Copperfield]

Hi, I am very new to recording and mixing using my pc. Here's what going wrong:

I am using Cool Edit Pro to record. I'll record a beat as one layer, then my guitar as another layer, then my vocals. When I am sequencing them, everything sounds great for about the first minute then everything seems to slowly get off beat as if the guitar is speeing up a little and the vocals speed up too so by the end of the song everything is off beat. It's not too noticable as it happens because it happens so slowly, but enough to screw it up badly by the end. Is it just because I don't have them synched to the exact millisecond? Because I think I've got them lined up where they need to be because it sounds great at the beginning. What would cause this and how in heck can I fix it? Thanks a lot for your help. This is very frustrating.

[heroics321]

is everything fine while you're tracking? if you're using midi for the beats, it sounds like you've got some tempo changes going on. also, may sound silly, but are you listening to the beat while you track your guitar and vocal parts?

[Burnt321]

This has happened to me before in CEP. You might have a latency problem. Zoom in real close to the beginning of the guitar and drum tracks and see if they line up exactly. If one is just a little off it'll throw off the whole song, even though it's kind of unnoticable in the start of the song.
Also if this is the case you should try to figure out the latency problem, I don't know what you're running but maybe putting in more RAM or a faster processor. Having to sync up tracks after every recording can drive you nuts.