Why does my motor only rotates backwards ?

[suparajicon]

After calibrating a Speed Passion GT 2.0 Pro sensored ESC with a Viper motor it will only run reverse and I don`t know why..

I´ve tried another sensor cable, another motor, calibrate it with the radio in ¨rev¨ instead of normal..

If it were sensorless I would just swap the motor wires, but I can`t because it is sensored.

Any idea about why the motor only runs reverse?

Thanks before hand.