Victor troubles

[Camren]

Ok folks having some really wired problems with my victors to start off no their not brand new but they are from last year they are hooked up in the
12v power distribution spot and are connected using a pwm cable. but when i enable the robot the motors starts spinning in reverse when the joystick is in the 0 position when the joy stick is in the -1 position it stops and when its in the 1 position it goes forward im looking for some insite on what i can do to fix this