Hi,
i had a DL-624+ some years ago. My problem was, that the router hung up (LAN and WLAN) every 10 to 14 days. The only way to get it back to work was unplug and replug the power. I've tried everything, other wlan settings, using an unused channel, updates for the router and drivers, WEP, WPA, longer shorter and no wlan-password aso....Nothing fixed the problem. One day a tree around the corner was struck by lightning, it was close enough to fry the router. Now i have a router from AVM, set up once and working since.