clicks during recording us-122 acid 5.0

[jjm213213]

Hi, I recently got a new Tascam us-122 soundcard. It seems to be giving ACID a problem of some sort. I have acid 5.0. I tried recording my friend play bass over some beats I had created. It starts off fine then after about 20 measures I hear clicks and static like noises on and off. those noises get recorded to the bass track. When I would record just one pre-recorded song from another sequencer into ACID it seemed to work fine. the song i was trying to record bass to has more tracks so it seems like it could be some sort of a memory issue or something like that. i dont think my computer is too slow. i wasnt having these problems when i was using my computers shitty soundcard. my specs are 2.60 ghz, 40 gb left of a 80 gb harddrive(plus ive added a 160 gb harddrive to my computer) , 768 RAM. anyone have any ideas of what it could be? or tips to try to stop the clicking. thank you
jacob