I just got the Tascam US-122L USB Interface and everything works fine except for one thing: When I plug my Line 6 Spider 3 amp into the interface, I get a humming-static. I'm using the "POD" style output from the amp, so it should work fine, but even if the amp is OFF, it still makes the noise when plugged in. You can hear the guitar, and if I turn the input on the interface way down and the level on the amp up, it's not as bad, but it's still there and not good for recording. Nothing else that I plug in gets that noise. I'm using Vista and Cubase (I know, I know) incase it matters, but like I said, everything else works fine. Any help would be awesome. thanks!