If you feel comfortable with this, I attached a script that when run with Dialcentral installed should download each of the pages I use for talking with GoogleVoice and save them to the current working directory. This could help narrow down at what side of things is the login process failing. It would require manual checking though. I would be willing to check over the files but I would appreciate it if first you did a quick run through for personal information. I don't like even having the hint of appearance of farming information.