D-Link DIR-825 :: Magically Reverts To Default Settings

What would cause my Dir-825 to magically revert to it's default settings?  This is the 4th time this has happened.We rely on a Verizon Network Extender for phone service.  It requires an internet connection to function.  When the router brain-farts, we don't have phone service... and we don't know it until we try to call out, or try to use the internet. We went to bed last night with the router working and woke up to it not working.  It's just my wife and I here.  I haven't seen the dog showing any interest in jacking with our computer gear.

When I access the setup utility and go to Manual Wireless Network Setup, the Wireless Network Name has defaulted to dlink, and Security Mode is None.  I have to re-enter my personalized setup info, (because that is what our computers are looking for), then all works fine again.I'm a savy XP user,  my wife has Vista (yuk) (she doesn't know any better; her daughter installed it).We are Comcast customers.  We own a Linksys CM-100 modem.  (When I connect direct by hardwire, (i.e. bypass the Dir-825 router), from the modem to any computer, or the Verizon Network Extender, they function just fine. Setup utility for Dir-825 says we have Hardware Version B-1; Firmware Version 2.02NA.

Set Firewall settings to Endpoint Independent for TCP and UDP. I see other posts addressing similar issues of reversion to default settings... but there don't seem to be any clear resolutions of these issues. On 2010-03-11, gunrunnerjohn posted, "I think there may be a shadow file that's actually in the FLASH that needs to get written back to make the changes stick.  I seem to recall there is a command to sync the RAMDISK copies to the FLASH."  Yet there is no more to this thread.