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Welcome!What Hardware version is your router? Look at sticker under router.
Link>What
Firmware version is currently loaded? Found on routers web page under status.
What region are you located?
Are you wired or wireless connected to the router?
Has a Factory Reset been performed?
What ISP Service do you have? Cable or DSL?
What ISP Modem Mfr. and model # do you have?
Can you set up the NTP services and see if it keeps correct time?
There is a know issue with the Year expiring at 2012:
http://forums.dlink.com/index.php?topic=51932.0Unfortunately, your model router has been phased out so I don't think there will be any fix for this particular model.
Let us know if the NTP services on the router helps any.