Just got my trigger back fro Bill Springfield and I'm having trouble getting the selector back in.  Yes, the hammer is cocked back and I'm installing it in the fire position.  The rear of the trigger seems to be blocking the selector from getting through, but just barely.  I can't seem to force the trigger down any further in the lower.  Any ideas?

I installed both of my bill springfield triggers with the saftey in place. I just wiggled the saftey from fire to safe a few times and the trigger eventually squeezed by. I then finished installing the disconector, hammer,  ect.

Hope this helps.

That did it, thanks!