Arrrgh! Leaky Faucet

Well I finished putting the kegerator back together today, and of course one faucet will not sit right. It's leaking and driving me crazy. Actually, under pressure, it shoots beer out all over the place! The gasket is fine, the faucet just won't go all the way in. I've tried tapping it with a rubber mallet, cranking on the faucet ring, it just won't seal. I posted to Brews and Views, a brew forum I'm a member of, maybe somebody will be able to help. I'm going to check Perlick's (the faucet manufacturer) website to see if they have answers or if there is a warranty.