Transmission problem

I have a 2008 can am renegade. I took out the engine and transmission to rebuild the motor. Reinstalled the motor and transmission and now the transmission will go into P R N it will not go into H or L. Also when it’s in neutral it is still locked up and the bike will not move. I do not have either clutch on and can not turn it on (waiting for new ecu). Wondering if it needs power or anything. I do not want to prematurely take it all apart again. Any help would be greatly appreciated. Thanks