Not enough gas?

[Masta Blasta]

I just got a nitro tank, an i put it on my RT. The gauge said it was pretty much empty but i tried it anyway. The gune just gets a leaking sound and wont should. Does this mean I dont have enough gas to cycle the gun or do I have another problem?

Thanks

[PyRo]

This means you don't have enough gas to cock the gun.