I tried setting up forwarding last night with "VOIPO1 FWD ME", but I couldn't figure out why it wouldn't work, and I ended up disabling it. I checked vpanel this morning and finally figured it out -- my cell phone number is ABCDEFGHIJ, but vpanel showed the forwarding number as 1ABCDEEFGH. I'll send the actual number directly if it will help.

When I used "VOIPO1 FWD <explicit number>", it worked fine.