Very basic recording Reason In PT question

[xian$]

This is such a stupid question I'm embarrased, but any help will really be appreciated.

I am have yet to get Pro Tools to record reason audio, I only started mixing the two a few months ago. I can sucessfully rewire reason from pro tools, create tons of midi tracks and write songs that play in reason. The audio does come back into my Pro Tools audio track I set up for reason, and the meter does move when I play the audio, but as soon as I arm it to record the audio does not come through? I know there is one simple little thing I am missing but I have no clue what it is. SOmeone please help...