[Stimpy1901]

We had this same problem. We found the problem was assigning the PWM ports more than once (as Dan said). The RobotDrive can take motor controllers as parameters, so you would do something like this:

    	jagFrontLeft = new Jaguar(9);
    	jagFrontRight = new Jaguar(6);
    	jagBackLeft = new Jaguar(7); 
    	jagBackRight = new Jaguar(5); //in your code, this was jagBackLeft again

        myRobot = new RobotDrive(jagFrontLeft,jagFrontRight,jagBackLeft,jagBackRight);
        //The above may not be the correct order as I do not have the Eclipse with me, but hopefully you get the idea

I do wish it would not compile and the error would be flagged sooner.