Purchased OS X Lion, error downloading
I purchased OS X Lion, it appears in Purchases and in red to the right it says "An error has occurred. (The update/install rectangle icon to the right is grey). So, I went to purchase it again and it said that I have already purchased it, so the update is free. But the update went to my work bar at the bottom and says waiting... It is stuck, and I still dont know how to download Lion. Please help. I have Mac OS X Version 10.6.8, everything is up to date.
iMac (27-inch Mid 2010), Mac OS X (10.6.8)