Help with Paring Remote to iTunes

I've got iTune 10 setup for home sharing and have installed the new Remote app on my iPhone 4....but when I need to ADD Library I click on my iPhone in iTunes and I don't see where I add the 4 digit passcode?

What am I missing?

Thanks...

Never mind....just got it. My MacBook Pro was on a different wi-fi than my iPhone. Makes a big difference....