If you can be more specific, I'll try to help.
Some general though they sound silly questions - have you attached a PoHo brick?
Have you set the Cab1/Cab2 to recognize the device? does it "blink"? to show your ID assignment is OK as in the instructions. To what have you connected the outputs?
The M - H - L settings would be next once these are cleared up. Think of it as a TPC.
Ralph