There should be a manual in the box. Follow the break in procedure and check the needle settings. I just purchased a FW06 ready set and the engine's settings were off.
There could be a couple of reasons why your engine just shuts off right after start. Try to give it some throttle (revving it a bit) when starting up. If it shuts off when you let off the throttle, most likely, your RPM is too low at idle. Adjust the idle adjustment needle clockwise just slightly.