JD, are you using an electric starter?  If so, hold your finger over your muffler exhaust hole and hit the engine with the starter.  Don't be looking directly into the carb when you do this or you'll probably get an eyeful..... don't ask me how I know.  [8D]  If fuel shoots out the carb or after you hit it with the starter, look down in there to see if there's fuel in the carb.  If there's no fuel in the carb, you'll probably want to go through OzMo's steps above.  If it's not getting fuel at all, I bet the fuel and vent lines are reversed or maybe your  fuel line fell off inside the tank and it's not feeding.  Don't ask me how I know either one of those either.  LOL  Don't worry dude, it's happened to ALL of us!    Stick with it and you'll get it sorted out.  Oh yeah, when you hold your finger over the exhaust, make SURE you keep your arm out of the way of the prop or get someone to stick their finger over it while you hold the plane....  Luckily that is ONE thing I haven't done yet. (knock on wood)