I am trying to enable visual studio to step through the .net framework source code when I am debugging.

I have tried with both Visual Web-Developer-Express-2010 and Visual-Studio-2011-Express-For-Web and I am getting the same problem with each.

When I get to the break point at the .net method I wish to step into I do right-click>step-into-specific>click-method-to-step-into. Then VS opens a new tab. saying it couldn't find or load the symbols. It gives a list of the assembly symbols it looked for. There is also a 'Load Symbols hyperlink which doesn't work. And another hyperlink that takes me to the debug settings dialog.

I have read tutorials on how to set it up and have believe I have the correct settings.

In the debugging general settings I have -

enable address-level debugging - checked

enable source server support - checked

enable .net framework source stepping - checked

enable just my code - not checked

In the debugging symbol settings I have -

symbol file (.pdb) locations - Microsoft Symbol Servers - checked

Caching Directory - C:\Users\MyAccount\AppData\Local\Temp\SymbolCache

Automatically load symbols for: all modules unless excluded - checked

Why is it not working? Thank you for your help.

edit: here is a screenshot of the error VS is giving me.