Cannot Load usb driver for Titan 1

[magicnz]

Hi guys, I would greatly appreciate any help on this issue. I got an AT&T Titan 1, I re-flashed the stock cingular rom using RUU and following this I cannot connect my phone to computer. I tried it with my windows 7 and vista both failed to load usb driver. I already tried uninstalling and reinstalling Zune but no joy For some reason my phone is being recognised as HTC Eternity instead of HTC Pl39100.