1996 ezgo txt wont move

[getzie]

I recently bought a lifted 1996 ezgo txt with light kit. They had removed the original key switch and installed a push pull switch instead and left the original key switch under the front panel. It ran fine, but had no power to make it up hills. I purchased an upgraded motor, controller, solenoid and F/R switch. The new controller is a Curtis 1205M and has an A2 busbar on it. Upon hooking everything up, I have found that the only way to get the cart to move is to slowly pump the gas pedal. It will eventually start to move...for a ways...and then stops again. I have wired and rewired without any luck.