I bought a new DIR-655 a couple of months ago, and it usually works great. However, I'm running into an intermittent problem, now happening every couple of days, where I find that it won't accept any new wireless connections. The Wi-fi signal is visible (WPA encrypted), but devices are "unable to connect". The problem applies to all kinds of devices, including iPhone/iPod, iMac, Windows XP and Windows 7. Strangely, if a device is already connected, it continues to work fine. Only new connections are refused.
I have found that I can temporarily correct the problem by physically disconnecting the power cable and plugging it back in. Almost right away, the affected devices can connect and all is well...until next time.
What might be causing the problem?
Thanks!