Disabled "Generate Local Resource" in Visual Studio 2010 Premium

Can anyone please help me understand 开发者_运维问答why the "Generate Local Resource" option is disabled in my Visual Studio 2010 (premium version)? I have a simple Website and first of all I couldn't find the option in the menu, then I figured how to show it in the menu but is's always disabled... I'm going crazy with this.

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Make sure that your page is open in Page Design View.

This option is a designer-based command, and will always be disabled unless you are in the design view with your page fully loaded.

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In my case (using Visual studio 2012), the option is sometimes greyed out even when in design view. To fix it, just switch to source view and back to design view again.