With the tests we did, an interface problem is highly unlikely.
Yes, it could be drivers--if you haven't already, download and install the latest versions of ASIO drivers.
However--and you're going to hate me for saying this--I'm most suspicious of some kind of hidden set up screen in your DAW or on your computer OS. What we need is a Garageband/Mac expert--and, alas, that's not me.
It works now!! Thank you so much, I guess I must have downloaded the wrong driver cause the driver I downloaded was for Fast Track USB. Anyway, thanks for your help!