Tmobile Google Voice Setup Failing

[apparao123]

hi ...i used to have atnt mob b4 ....i configured it to google voice......i moved to tmobile.......iam not able to setup google voice for tmobile no.....getting error msg when i try to setup

"[b]call forwarding..unable to processs request"[/b]

[Spartan]

set cheskovachu anukunta....