Leak

Ok so i just got my vertical adaptor screwed in, and my new expansion chamber installed into my custom pro. I took my co2 tank and screwed it in put some paint in my gun and shot, it shot twice with one trigger pull, i shot it a few more times, it did the same thing each time, then i heard something, I could hear the co2 leaking from inside my gun, i took it apart screwed the same co2 can in and the leak was coming from inside the the power tube and out that long tube on it that the front bolt slides over. After about 20 seconds the co2 tank was empty, wasnt even close to being full from the start and it wasnt leaking that much really. I took my other co2 tank screwed it in, everything seemed to be fine so i put my gun back togeather shot it 3 times, it double shot all of them and started leaking again. I have no idea whats going on and i need help so i can go paintballing sunday. So i have a Dop X-core 8 stage expansion chamber, and a vertical adaptor on a tippmann custom pro. Please help me.

Try tightening all screws that have gas go through them.

oil your rear bolt.

I went paintballing today and it was working fine when i chronoed it in then once i started playing a game it started acting up again and i had to cock it every time i shot, so i took it back up to there shop and they are going to fix it, for free, or just send it to tippmann and have them fix it.