Make sure you are declaring the victor properly
Code:
Victor* vicShoulder;
Further down, you should have something along these lines
Where the PWM number is where you plug it into your digital sidecar
Code:
vicShoulder = new Victor(PWMNUMBERHERE);
Once the victor has been declared and constructed you need to actually call it or set it to some value
Code:
vicShoulder->Set(float value of speed);
Remember that once you set it you will want to also shut it back off by sending it a 0
Make the appropriate changes, and if still does not work put a multimeter on the proper pwm output channel to see if its a bad victor or not.