Internet Connection Sharing with Vista

[ihcc2uni]

Hi all - I am new to the PPC world and am confused on this one. I have searched other forums but can't seem to find one close enought to what I am stuck on. I have the HTC Mogul from Sprint. I am trying to use the phone as my modem for internet with two different laptops, one personal, one work. My personal one is an XP SP2 machine and the internet sharing works perfectly on it. On the Vista one I can't get it to work at all. Vista recognizes my device, when I go to start Internet Sharing on my device, I tap connect, it starts to dial out, vista "dings" acknowleding something is going on but then everytime my call to Sprint #777 fails and give me that my username may be incorrect and to try again later. Any ideas/suggestions on this or is there a forum that already has this topic that I am just completely missing?

Any ideas would be great!