If it works with one frame, but not the other, then it is probably and adjustment issue. Put the safety on and air up the gun. Hold the trigger against the safety and adjust the trigger rod so that it is almost touching the back of the trigger (approximately a credit card thickness). It should work if adjusted like this.
Your macro line may not have the required rating. Most macro line is only rated for 300psi operating pressure with a 900psi burst rating. You need a good quality macro line. These can have a burst rating of more than 2500 psi. Even then, you need to watch for scratches or kinks that may compromise the integrity of the macro line.
Except for the Automag in front, its usually the man behind the equipment that counts.