This answer will only apply if you are running your solution
through IIS. You will know if this applies to you IF you open up
your website/project by doing the following: From within visual
studio-->Open Website--> Local IIS -->Select your
What worked for me was going (xp machine) to add/remove programs
--> Add/Remove Windows Components--> Click on IIS--> Click
on "Details". Be sure to have Front Page Extensions installed if
you are debugging through IIS.