Turning Navigation Silverlight into out-of-browser application

I have created Silverlight application using Navig开发者_如何学运维ation template. I wanted to turn it into out-of-browser application. But on the Debug tab, out-of-browser application radio-box is not enabled. Why it is so and what can I do about it?

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This is not related to the fact that its a Navigation application. It works well in oob.

Is it with VS2008 or 2010?

Try re-creating a new project (using Navigation Template) to see if the radio button is enabled (in my case it is with vs2010). If it works on that new project, I suggest you transfer all your sources files on that new project.

Add a screenshot of your debug tab.