I had this problem with mine. I had to play around with the CO screw to get it to throw some fuel out. All I did was undo one of the injectors and turn the screw anti clockwise (i think) until the fuel started to come out when I turned it over. The best way though is to get it set-up properly cos you don't want to be running lean and burn your pistons out.

Hope this helps.

Cheers
Dave