insert your normal SIM card.
Install ultrasn0w - verify that ultrasn0w works.
It should say ActivationState: FactoryActivated
Select Revert Lockdownd to Stock
Select De-Activate iPhone
Connect the phone to iTunes and let it activate normally.
verify ActivationState: WildcardActivated
Click on "backupActivation"
uninstall SAM (if you want to, it's no longer required)
If that doesn't work, then you need to try the options under Method. This generally requires that you know which network your phone is originally locked to.
what does it say in SAM under ActivationState and