Help - no sound from subwoofer

Hi, i cross posted this in the subwoofer thread, but haven't got any response. NOt sure if this is a sub or receiver problem.

My Bic F12 sub has been working perfectly. I recently moved so I unhooked it, packed in original box and packing and it was carefully loaded onto moving truck by professional moving company It was unloaded, unpacked and hooked back up. All of a sudden I get no sound. All speakers work except Sub.

I get green power light.
Checked fuse and it looks ok
Checked connections, and receiver settings.
Volume Uo
Crossover on 80
Tried different cable
Tried plugging into one of the pre-out terminals (front and center)

During MCACC setup
Confirmed Sub was set to Yes
I don't get any sound from the channel tests (all speakers work buy Sub no noise)
All speakers set to small
Auto speaker setup also fails to detect sub

I don't have another sub to test (i don't think I can use my polk tower speakers as a sub to test if sound is coming from subwoofer out on speaker)
I don't have another receiver to test to see if there is a problem with subwoofer out connection.

Not really sure how either the receiver connection or sub could go wrong when it was working fine two days ago and the only thing that changed was an unhook and re-hook

Any other ways I can test to identify problem.

thanks for reply. yea I tried with my switch in both auto and fully on. I normally always keep the switch on Auto, so it was there by default. but when the sub wasn't firing, i switched it to On to make sure it wasn't a probably with the frequency kicking it on or something.