Installing Windows 7 through Boot Camp

Hello, I am having problems trying to install Windows 7 through Boot Camp. I have already deleted my old Win XP. I get to the step in Boot Camp when it asks me to enter the Win OS CD into the computer, than click continue or w/e, and it says no CD found. It's not a problem w/ my CD/DVD reader cause it appears on my comp that I have CD in. I have already updated my mac for all firmware and OS updates.

I am using MacBook Pro 2009, BootCamp version 2.0, and Windows 7.