@BCC_Robo_Barons, your code looks fine at a glance. You have to give more detailed debugging information, before people could help you further.
You first need to confirm that two left wheels spin forward if you lift your robot up in the air and push Axis3 control stick forward. Similarly, when you move Axis2, you should expect both right wheels to move in the correct direction.
If both of those check out and you still don’t have correct movement when you put robot on the ground, you need to ensure that mecanum wheels are installed correctly.