Great sig considering it's your first!
Just a few little tips though..
I don't think the red text fits with the background, I'd say use a bolder white font and mess around with overlay and outer glow(black, always black) but that's just my opinion.
Also you should do something with the outer lines, perhaps some glow or mess about with strokes.. etcetera, again, just my opinion
Oh, and I think a dark-red background would fit better