(Note that all data will be lost when reflashing so back it up if you have any)
How about his, download a new rom from here:
http://forum.ppcgeeks.com/showpost.p...&postcount=858
Then:
-Open the ROM exe file with WinRAR/7zip or w\e archive program
-Extract the file RUU_signed.nbh
-Rename that file to TITAIMG.nbh
-Make sure your microSD card is in fat32 format. (Format your card on your PC to make sure)
-Copy TITAIMG.nbh to the root of your microSD card
-Power off the phone
-Power back on into bootloader by pressing and holding the POWER, COMM, and CAMERA buttons at the same time. (The 3 buttons on the right side of the phone)
-You should see a multi colored screen show up and it should see the new ROM on your microSD card.
-Upgrade by following the on screen instructions.