Can't text in iOS 5! Help!!

I've installed iOS 5 GM on my phone and everything was going perfect until I tried to text. I get an error saying my SMS mailbox is full. It will let me send texts but not receive them. I've tried deleting entire SMS conversations to make more room but I'm still getting the message. The only way I can receive texts is to turn my phone off for a few minutes and then turn it back on, I get all the texts from the last restart but then can't receive any more. I tried restoring my phone as a new phone instead of from a back-up and it worked perfectly but I really need the back up because I need all my contacts, etc. I installed iOS5 on a friend's phone from my computer doing the exact same thing I did to mine and his worked fine. I can iMessage him but can't SMS anyone else... My phone used to be jailbroken so that might have something to do with it... Anyone else having this problem? Anyone know what's wrong? Is there a way to only use parts of a back-up? Like can I restore from a backup only using the back-up of my contacts and app settings?

Thanks

 

Yes, I have been jailbroken but no, I didn't restore from a jailbroken back up. I restored and updated to 4.3.5 before I updated to iOS 5. There were probably still traces of it though since I never started completely clean. If I restore without the back-up, how can I get all my contacts back?

 

I feel dumb... I just went through and deleted all my texts, restarted my phone, and it worked fine.. I guess the cap on texts stored is lower in iOS 5