Currently Being ModeratedMar 13, 2012 5:20 PM (in response to guitardog_01)Re: new to the discussion group.. help!
The most common points to visually inspect will be the CAT-5 cable, the CAT-5 jacks (pins cannot be corroded or bent on either pedal controller or receiving amp). Unfortunately it sounds like you've done those things, so the problem is further downstream, most likely inside the controller itself.
I'd say if you lived close to a Guitar Center, you could bring the FBV Express controller with you and test it with one of the showroom Line 6 amps that it's compatible with. If the same symptoms occur, you've isolated the problem to the controller. If it does NOT, then the issue lies inside the 150 head.