HTC Hero, Google Voice, and CellularSouth

Does anyone have the hero working with making calls from the phone with GoogleVoice? I have it installed and everything works fine, but placing calls on the Hero with my GV number. It prepends a 1 to the GV network number. It is 769 something. I get a network busy error please try again error and a fast busy. If I hang up and call the 769 number without the 1, the call goes through to the original number I was dialing with GV. But this is a PITA. Any help would be appreciated...