Problem with IOS 5 syncing contacts

Hello everyone, today i purchased a developer slot from a member here on Modmyi and immediately updated to IOS 5.0 beta 1. I then restored my phone from the backup i had before i updated so i could get back all of my contacts, mail, messeges, etc. After doing the restore from the backup, i cant seem to get my phone contacts to show up. The previous text messeges are all there, but it just displays the phone number and not the contact. If anyone has a solution to this problem i would greatly appreciate if they explained how to fix it!