Issue in debranding

[surdy]

Hi
I debranded my w580i using XS++2.0 and the files
W580_R6BC002_MAIN_GENERIC_LA_RED52
W580_R6BC002_FS_AMERICA_1_RED52

I followed the instructions on Tutorial | Flashing/GDFS-operations/Uploading files with XS++ - SE-NSE Forums

everything went fine.

When i started the phone it started fine , showed sony ericsson logo but then said Insert chip. It is somehow not accepting my sim.

What could be possibly wrong.

I had backed up GDFS before flashing can it help in someway.

Am i totally screwed or is there some way out.