I went through googling.....a lot for finding a solution of this problem but couldn't find one..
I am always of thought that sharing your solution can save other peoples time..
so here what worked for me and possibly for you also..
just right click your project in solution explorer-> go to property pages->in the left pane select start option->then in the right pane under debugger check both ASP.NET checkbox as well as Native code Checkbox and you're done..
Happy Debugging...
