D-Link DIR-615 :: Connection Drops And Network Doesn't Even Show Up On InSSIDer

I have had my DIR 615 router for about 6 months, and have had no problems. I have a notebook (Sony Vaio) and I also have a Blue-Ray Player and my DirecTV DVR connected by ethernet. Starting a few days ago I was having connectivity issues. At first I could see the network on my Vaio, but the Internet kept coming and going.I did some troubleshooting on the adapter and that seemed to work. Now I am having an issue where every 2 hours or so the wireless drops and the network disappears from the list of available connections on my notebook. I have had my netbook on (connected wireless) and the issues are replicated on that system.

Both of my wired devices do not see any interruption in connectivity. Living in an apartment complex I suspected interference and indeed there are a ton of other networks in range (as per inSSIDer 2.0). As there is no channel that is clearly open, I have set my router to auto channel scan. I also have tried some of the steps outlined in other threads. The thing I am noticing is that when the network connection drops my network (which has a unique name) doesn't even show up on inSSIDer, it just disappears. When working, my network is consistantly in the -25 range on inSIDDer.I should point out also that my notebook is a mere 8 feet from the router, and there are no obstructions.