Help Cricket not taking air

Hello to all ,
Long time since I have posted.

Side note : I am not well versed at taking down and fixing guns but I can do a little.

2 weeks ago my cricket .25 had a leak. So I called the company where I bought it and they said replace the o-ring. Ok no problem.
I replaced the O-ring and gently greased it up and installed the cap back on.

Now it will not take air. Nothing.

So i called the company which is always willing to help and they sent a completely new airtube with gauge. I took out the airtube and installed the new one.

SAME THING.. will not hold air.

What am I doing wrong? Thanks for your help,
JR