Did you try a hard reset?
Turn off phone ,hold volume down +hold home button +hold power button all at the same time until your phone comes back on.
IF YOU DO THIS IT WILL WIPE PHONE CLEAN!!!
If you have no backups!
NEVER FACTORY RESET A ROOTED PHONE!!!
NEVER USE ROM MANAGER!!!
If you plan on rooting, please read the stickies at the top of the all things root subforum.