Visual Studio .Net 2005 JIT debugger isn't available

For some strange reason, I can’t seem to debug my .Net 2.0 application via VS.NET 2005 debugger. I call Debug.Fail(“…”) in my code and run it via Ctrl+F5 – this is the screen I get:

Where the hack is my VS.NET 2005 debugger ?!
If anyone found my lost debugger, please send it back to this address (via comment).

Thanks!

btw – debugging with F5 works fine; That makes me wonder how can I control the items in the box (at the picture), maybe registry magic is required. I’ll update if I’ll manage to find my debugger …