I have given up doing dkp, Passed it off to a couple officers do to this error.
It dosent matter if I wait 5 sec, an hour, a second. Simply dosent work for me.
Does the program wait to give the error or does it give an immediate error? If the error is immediate, it's almost always a firewall program (like Norton Internet Security) blocking the requests.
I've had this SAME problem, by accident i found out that if i DON'T have my guilds website open, it downloaded... Also if i DID have the website open, and the ADMIN page was displayed (obviously if your doing dkp stuff) It didn't download... some error came up. But if i closed the admin page and was just on the main news page and tried, it worked.
Now i don't know if it will work for you, but it worked for me, and i can actually test it by opening Admin page and trying to download and it doesn't work.
If it's an immediate error, then something is definitely blocking the download in some capacity or another.
The whole "having the admin page open" thing is odd indeed. The GRSS shouldn't use anything from the browser, so the two shouldn't correlate to each other at all. I'll look into that one.