Make sure you are running the Debug mode and not Release. There is a combobox at the top toolbox next to the right arrow.

To open the modules window, you must be in the middle of debugging and then select Debug from the menu, then choose Windows, then choose Modules.

Look at a related Message #687180.

Another resource is Thread #672911.

>I'm also having problems with debugging my ASP.Net app. I had a look at the links you posted and still can't figure out what problem is.
>
>When I set a breakpoint and run the app, the breakpoint symbol has a question mark and the tooltip text is:
>
>

>The breakpoint will not currently be hit.  No symbols have been loaded for this document.
>

>
>One of the suggestions in the document refers to the 'modules' window. ("Please make sure that the expected DLL is loaded with matched debug symbol file. You can check it with “Modules” window.") Is the modules window a C# thing - because I can't seem to find it ...
>
>
>
>>Check out these resources for information about troubleshooting this:
>>
>>http://www.gotdotnet.com/team/csharp/information/Whitepapers/howtosolvedebuggerproblems.doc
>>
>>http://support.microsoft.com/default.aspx?scid=KB;EN-US;q306005&
>>
>>
>>>All,
>>>
>>>I am trying to debug a .Net app and get the following message:
>>>
>>>Error while trying to run project: Unable to start debugging on the web server. Access is denied. Would you like to disable future attempts to debug ASP.Net pages for this project?
>>>
>>>I am a member of the 'Debugger Users' group.
>>>
>>>What else needs to be set to allow debugging?
>>>
>>>TIA
>>>
>>>Rex