MarketPress

I'm trying to do my first digital download
I've installed the plugin, created the page
uploaded the mp3 file (about 5mgs)
I went through the setting page
Set up my paypal stuff and etc

I tested the page. I got an email from the web site. I clicked the order link and was taken to my order page.

I don't see a link to download the mp3.
I did set the price to zero (0.0) does that have anything to do with why I was not able to download.