Unable to download server add-on for 10.7

I am attempting to upgrade a 10.6 Server to 10.7. Cannot find 10.7 or 10.7 server in the app store (luckily I saved an electronic copy of the 10.7 software, but when I go to install it, I get a message waiting to download Mac OS X server add-on and I am instructed to go to the "Purchases" page of the app store to check the status of the download and there it sits. Nothing. I have a 10.7 server that I am planning to upgrade to 10.8 but wanted to do this one first. How do I get past this obstacle?

Paul