I have a clean install vers 1.3.9d
[was easier then upgrading]
Store is Art for Scrapbooking
I have imagehandler and zen lightbox installed nothing else added.
Hosted on Godaddy [I know I was crazy at the time lol] i have curl proxy set to True and address to proxy.shr.secureserver.net:3128

Everything was working perfectly under 1.3.8a so I must have missed something in my setup but am stuck.
I installed this fresh then added products and downloads. All products are downloadable.
I tested soem products and when i click on the downlad link to download test prodcut I am redirected to a url like this

http://pub/.gfufcekbgqzczxjqp/*******.zip

The product is in that folder in .pub directory but I get server not found error. I have worked out that the url is missing the http://artforscrapbooking.com at beginning. If I add that in the link works.
How and where do I fix this.