I'm having the same issues -- I used DRA all summer long until around August or early September when they removed DRA form the menus in the DishNetwork account area. I knew the direct URL and continued to use it with limited success then in mid-September everything crumbled. Both DishOnline.com (which I hate with a passion) and DRA (which I love dearly) both fail to recognize my receiver as being connected. I have to unplug the network and USB cable and re-plug them in and wait a few minutes. I find it best (perhaps just coincidence) to use DishOnline to keep pressing the "reconnect" button until it loads and then go to DRA and refresh and it usually works. I'm EXTREMELY frustrated by this as I use it every single night to watch DVR'ed shows while working from my office in another room. I seriously spend 15 to 20 minutes EVERY DAY unplugging/plugging and refreshing. It's become very very frustrating to the point where I even went looking to see if DirecTV had a similar competitive product. As a 10+ year subscriber of DISH I've never felt frustrated. Of course chatting/calling support only results in reboot your receiver, reboot your router, etc. etc.
I hope someone deep in DISH support recognizes the problem and they're actively trying to resolve whatever it is.
If anyone finds out the sure-fire way to get a connection please let me know! I've tried everything from restarting the web browser, clearing cache/cookies, unplug/plug the adapter and network cable, going into the installation menu and resetting the broadband connection (which of course ALWAYS says it's connected and fine). Nothing seems to fix the problem immediately and consistently.