iPhone 3G Sim Slot Damaged (I think)

Okay so i updated to baseband 6.15.00 from 5.14.xx << (The one thats not unlockable) so i could unlock using ultrasn0w.
I successfully update baseband to 6.15.00 and iPhone works perfectly. Install ultrasn0w and insert my sim and fail. The sim card is not detected
It says 'NO SIM'. I open up the sim card slot and take a look inside and compare to my other WORKING iPhone 3G (Yes i own more than 1) and see that there are meant to be 3 lights on. Take a look in the not working iPhone and see only 1 light is on. Any help will be much appreciated thanks a bunch :)