Debugging .NET framework source code

I've already read some posts on SO re this issue but couldn't find a solution in them.

When I try to step into the .NET framework methods I get the message below on the output window.

• "Step into: Stepping over method without symbols"

But Modules window would show that "Symbols loaded" to the cache directory I have specified.

My Envinronment is as follows:

• Windows 7, 64 bit.
• VS 2008 .NET framework 3.5 SP1.

I have done the following already:

a)Toosl -> Options -> Debugging -> General

• Unchecked "Enable Just My Code"
• Checked "Enable source server support开发者_C百科"
• Checked "Enable .NET framework source stepping"

b) Toosl -> Options -> Debugging -> Symbols

• Specified the symbols cache directory

Has this problem been fixed and a solution available? Appreciate if someone could throw a link at the KB describing the solution.

Thanks.

A security update on Visual Studio might have caused that. Try reinstalling it (together with SP1). Just like here: http://connect.microsoft.com/VisualStudio/feedback/details/469279/net-framework-source-stepping-broken-in-vs2008-sp1