TetherMe APN editing problem

Hi there.

I upgraded tetherme to 2.2-30 and now I can't edit any APNs. When I go into Settings-Tetherme and turn APN Selection off automatic nothing comes up to edit the APN settings like before.

I have the tetherme APN editing installed aswell. I have uninstalled and reinstalled but still no luck.

Has anyone had any similar problems? Is it a bug in tetherme 2.2-30? If so can I downgrade?

Help would be appreciated as I cannot use my broadband sim card without being able to edit the APN settings.

EDIT: I'm on an iPhone 3GS with iOS 4.0.1

[SOLVED]
After looking around the internet for awhile I found out I have to install Supreme Preferences 3 (which was hard to find. Had to search different Cydia repos.) and then enable the Cellular Data Network to appear because apparently it can disappear sometimes on iOS 4.