Need help please

[dex410usa]

Hello everyone,
I just got a used DEX410 and i decided to rebuild it. After rebuilding the diff and checking everything. I put a LRP sxx speed control and x12 motor, THE problem is that my buggy goes only revers!!!!! I have noticed that the motor is placed differently then US cars do, does that mean i need a new Speed controller? or did i rebuild wrong? I have checked the motor wiring, ESQ setting, and controler setting all look good. Can any one help please?

Thank you

Alex