Resetting VoiceMail Destination?

[Shiggitay]

Okay so I got my Epic 4G recently and I absolutely adore it. It works flawlessly for me thus far, but since I rooted it I can't seem to get voicemail working... I have a greeting set for when people call. I've test it with my Skype Out credit, and I do indeed get my greeting, but when I leave a message I don't get it on the phone. I had been using a third party "HulloMail" voicemail app, of which has been disabled and uninstalled since. Is there a dialer code or something that I can do to reset the voicemail entirely in terms of where it goes?

Thanks in advance,
Shiggity