How do you invite your friends to your game on Resident Evil 5?

Help!
How do you invite your friends to your game on Resident Evil 5?
You have to press the PS button on your controler. Highlight your friends name on the friends list. Press triangle to bring up a menu. And select invite player and it will invite your friend to play resident evil with you.
Reply:yo i need to know whats wrong because when i do it like invite my mate it says searching and my mate accepts but doesnt work? i know how you feel such a great game and lives up to the 4th but sadly no-one can beat leon.... ever? ........ yh ever