I am using a 6x4 prop on a 2200kv motor probably a 5x5 would be better on yours but not the problem.

The prop may be going the right way but is it on the right way [sm=confused.gif] double check, I have done it loads of times when I break a prop and dont think when fitting it.

Point it high and launch at full power unless something is badly wrong it will climb like mad with a 2700kv motor.
Run a bit with it if you are not confident throwing it.