[mikets]

By default, the RobotDrive class will instantiate Jaguars as its motor controllers. If you are using Victors you need to explicitly instantiating them yourself and use the following constructor instead:

RobotDrive(SpeedController *frontLeftMotor,
           SpeedController *rearLeftMotor,
           SpeedController *frontRightMotor,
           SpeedController *rearRightMotor);

In other words:

class MyRobot: public SimpleRobot
{
    Victor leftFrontMotor;
    Victor leftRearMotor;
    Victor rightFrontMotor;
    Victor rightRearMotor;
    RobotDrive drive;
 
    MyRobot():
        leftFrontMotor(1),
        leftRearMotor(2),
        rightFrontMotor(3),
        rightRearMotor(4),
        drive(&leftFrontMotor, &leftRearMotor, &rightFrontMotor, &rightRearMotor)
    {
    }
    ....
}