Why isn't the a/c cooling? on 2006 Mercury Montego

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
I tried adding refridgerant to it, but it won't take a charge.
(1) Answer
That's why it requires a professional tech to diagnose the a/c.
I know we already have to much federal and state mandates, but self charge kits for a/c systems need to be outlawed.