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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?
What browser are you using?
Try Opera or FF? If IE 8 or 9, set compatibility mode and test again.
Try turning off these features in Chrome: Top right corner, little bars for options > Settings > Settings (on left) > Show advanced settings.
Uncheck these:Use a web service to help resolve navigation errors
Use a prediction service to help complete searches and URLs typed in the address bar
Predict network actions to improve page load performance
Enable phishing and malware protection
There are some security standards that are set up by the WiFi organization that most Mfrs have to work with and abide bay, and it's possible that these standards effect how the duration of a user access is maintained on the routers web page. Yes it would be nice to be able to disable this however there could be other ramifications if someone disabled this feature and something happened while this feature was disabled.
If you want to read up about the router, you can look at the User Manual thats available and has screen shots and information.
I would contact D-Link support and ask them what official time out delay is for this model. For security reasons there is a limited time out delay, usually 3 minutes is maximum. This model is new and there could be something wrong about the FW.
New FW has been posted:
http://forums.dlink.com/index.php?topic=54610.0Keep us posted.