Can you move the motors through SmartTerm?
6, 0, and 64 sounds like the default PID values. You must tune your servos to your system.
The plugin will not do magical things to set up your Galil servo system. So generally, you tune the servos and get the motors moving in SmartTerm before attempting to use the plugin.
Then, you will need to configure the plugin. You will need to map Mach axes to Galil axes in the plugin as well. (axis mapping tab). This is all covered in the plugin documentation.
Steve