I'm dealing with a strange problem in a Behringer UCG-102 USB interface, which I bought recently. After connecting the guitar and the phones to the device, I installed the ASIO driver from the CD, and closed all the applications with sound in the system. With Guitar Rig 4 opened, it detected imput signal from the guitar, but I couldn't hear any sound. In "Routing", the outputs were set to "BEHRINGER USB AU" and were apparently connected. What can be done to solve this problem?
Try running it as a VST in a DAW and turning on the monitoring on the track.
Try turning the input volume up on the Interface?(it should have more than one volume) Its hard to help without seeing exactly whats going on. Sorry.