propdrive

I cannot get my quadcopter to lift off, not sure if i need different motors? Need some suggestions, based on my quad build: HobbyKing X650f frame kk2.1 flight controller Q Brain 4 x 25A ESC (modified the wiring to meet the layout of the kk2.1 controller) 4 x NTM Prop Drive 28-26 1000kv/235w...

http://www.hobbyking.com/hobbyking/store/__25081__NTM_Prop_Drive_Series_28_30S_900kv_270w_short_shaft_version_.html these are the motors using a slightly larger wire than my afro slim 20amp...