This is driving me mad...

I changed my strings last night and for some reason my B string is buzzing when I hold down the frets. I can play it open, but no matter where I am on the fretboard it buzzes. (And by buzzing, I mean it just makes noise and you cant heard any notes)

All of my other strings are perfectly fine.

It is a Schecter C1 w/ Tune o matic bridge.

Have you checked that your string lays in the right track on the bridge? If it's slightly misplaced (not completely in the crack where it should be) there is a terrible buzz.