I was quite excited when I got my B7K today

... but that turned to disappointment - I get nothing but noise from the 1/4" and the XLR when the pedal is engaged (ok, my bass is way in the background). No issues when the effect is turned off - my clean signal goes through... did I miss something with the pedal (I know there's no manual with it)... basically I get an overpowering ground hum as soon as I engage the pedal.
I can hear my bass under the noise... the blend and level controls add to the hum (they have to be nearly off to get the hum to stop), and the grunt swtich; in Fat and Raw mode, it just makes the noise completely overbearing.
I'm really disappointed that a $400 pedal can go out the door without being checked... and now I'll have to pay to send it back and I guess I'll have to pay for shipping to have another one sent to me (I'm hoping I can just get my money back and not have to deal with this).
again, if I missed something with this, please chime in... yes, I am using a working 9-volt adapter (works fine for my Sansamp Programmable BDDI), used several basses, and used the ground lift button - all with the same results: completely unusable.