Coldfusion and PGP

Hi All,

I have pgp desktop installed on my server and I try to decrypt a string using my private & public key but I am completely lost...
Should I use cfexecute with gnugp, a cfx tag or open pgp or the Bouncy Castle Cryptography Library ...

I have a post form where I recieve a encrypted userid and I just need to decrypt it ...
Can you please help ?