Cricket carbine problem?

OK guys,my wife completely shot out all the air in my cricket carbine and now I cannot get the regulator to seat to stop bleeding the air out.I need to know what the trick is to seat the regulator to hold air.I also need to know what the maximum bar/psi the carbine can tolerate as I don't want to burst the air tube if I give it a good shot of air from a 4500 psi tank.
Thanks for any ideas/advice :)
 
dodge3500
JoeWayneRheaHave you tried cocking the gun ?/sounds silly but I had same problem.with my Carbine . I only fill mine to 220 bar max

Haven't tried cocking it then filling, I'll give that a try after church in the morning.:)
Thanks

Hey man thanks:)
I did as you said and it took air!
I'm gonna do me some shooting tomorrow.:)
Thanks again