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.

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.

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.