Im a noob so im not that good with parts but,i have HPA just to put that there, the gun has a fresh battery in it, the air tank is full, but it wont shoot. It wont even dry-fire. Like theres no air getting out of it. When i un-screw the tank it releases that bit of air but when its on tight it wont fire. Its hard to explain, but i did the best i could. My dad thinks theres something with the trigger, like its not making connection of whats telling it to fire. If anyone has a Vibe, you hear a beep when you pull the trigger without a tank on, right? well when it has the tank connected, theres no beep. It would be greatly appreciated for suggestions and help.