How to disable "authentication required by Wireless network" Popup

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http://forums.fedoraforum.org – Hi, I am using HP laptop with fedora 17. I use wireless network, when ever my Wireless router turnsoff fedora showing a popup message asking for Wireless network password and the popup will not close until I manually cancel it. The problem is, when the router turns off due to power failure, then I am getting this popup window and system not connecting to wireless network eventhough the router got power and network activated. The popup stays on the screen until I manually click connect/cancel button. does anybody know how to disable this popup and make network manager work like in windows whe (HowTos)