Cannot connect to mobile network...help!

[speedoffastness]

I rooted my Nexus S and installed a clockwork mod from ROM Manager and have since reverted back to stock (bootloader is still unlocked). Ever since I installed the clockwork mod, I cannot connect to a mobile network. All of Sprint's info has been erased out of the network settings and I have tried everything to get it fixed. Any words of wisdom would be awesome please!

 

[speedoffastness]

oh and it will also not show when plugged in via usb. Even with debugging checked, it does not show and the connect to usb storage screen does not show up