Debugger in VS 2005 does not stop at breakpoints.
Solution:
Make sure you have the debug setting in the web.config (http://forums.asp.net/p/1278210/2440003.aspx#2440003)
Ok, I already had the corrects settings, yet still the same problem.
This resolved it:
right-click solution --> configuration. My settings where: configuration:.Net, I changed it to Active .Net.
Learning is doing ...
Robert