Now, now... just relax (and please lose the caps, even though they were appropriate to imply your excitedness). I'm sure that knightRider or many of the other FAL owners here have experienced something similar and can give you a hand here. I'll bet there's just a lever or some-such that needs pressing or 'finaggling' with a tool to release it.
I'll do a quick search online for this issue and see what I can't find (I don't own one, so I'm not really familiar with the inner workings).
Oh, and welcome to the "Friendliest Gun Forum On The Internet".
Edit: this disassembly tutorial may help you figure out on your own what may have gone wrong:
Collecting and Shooting the FAL Rifle - Rifle Disassembly and Reassembly