What exactly is the "user control" button you cite? If it's the calibration button on the Jaguars, then you're using it in the wrong method. Refer to the
Jaguar intro manunal to understand what it does.
Regardless of configuration, if your code initializes the ports the Jaguars are connected to, then the Jaguars should turn solid yellow when you enable the robot.
If you're on PWM, make sure that a)the DS module is in slot 2, b)all three power lights on the DS are active, c)the DB37 has been fixed as per FIRST's directions and is properly connected, d)you are actually generating output signals on the PWM ports the Jaguars are connected to.
If you're on CAN, make sure that a)your serial-RS45 converter has been properly assembled, b)your cables are properly made, c)there is a terminator plug at the end of the system, d)you have configured each Jaguar's firmware, and e)you are using the correct CAN IDs.