Gun barrel leaks out Co2 when I put in co2

so I just got this air gun and I was trying to put the co2 cartridge in the gun, I saw some videos saying how you just screw the bottom in real fast and hard. but even when I screwed it all the way the leaking still went on. I later realized that there was co2 coming out of the gun barrel. this is my first time owning an air gun and I don't know whats causing it. is this possible to fix? the gun and the co2 cartridge are both made by the same company umarex and the gun is beretta elite II. tank u and have a nice day (sorry for my bad English)
 
"Jonah"It might help if we know which airgun you have.
In the first post he says it is an Umarex Beretta Elite II which is either a BB pistol or an Airsoft pistol (both carry the same name). ;)
My best guess after looking at the manual would be valve problem which could be as simple as some trash in the valve which might be cleared by firing the gun several times.
If not then it is either warranty time, paid repair time or new gun time!

Edit: Glad you got it fixed. Thanks for the + accuracy!

Thurmond
 
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