Read this.... it should help
Ten Steps to Successful Debugging
It's terrible when it happens-but rest assured, it will happen. You see,
debugging Windows programs is a pretty simple process and one not prone to
failure. But debugging Web applications is much more fallible.
So, what should you do if you attempt to start debugging a Web application
and get the dreaded "Unable to start debugging on the Web Server" error?
Here's your one-stop checklist...
1.. Are you working offline in Internet Explorer? Launch Internet Explorer
and look in the File menu. If "Work Offline" is checked, click it to
unselect this option, restart Visual Studio .NET, then try again.
2.. Are there syntax errors in Web.config? If there are, you won't be able
to start debugging. To check this, click Debug, Start Without Debugging and
see whether your browser reports back an error. If it does, fix it and try
again.
3.. Are you running Windows 2000 or Windows XP? If so, continue to step
four. If you're debugging a remote ASP.NET application under Windows NT 4,
you'll need to launch the application without debugging, then manually
attach to it. Look up "debugging ASP.NET Web applications, system
requirements" in the Help Index for more information. Word of advice:
upgrade.
4.. Are you a member of the Debuggers Users group? You may be logged on as
Administrator, but it's still worth checking. If you're not in the group,
you may be denied your debugging rights.
5.. Does your Web.config file have its "debug" attribute set to "true"? If
not, you're going nowhere. You might also want to check that the
Configuration Manager lists your project as 'Debug', not 'Release' (use the
drop-down box on the standard menu to alter, or choose Build, Configuration
Manager).
6.. When you created the project, did you specify an IP address rather
than a machine name? If so, launch Internet Explorer, choose Internet
Options, select the Security tab and add the IP address to the list of
trusted sites-then try again.
7.. Did you install IIS after Visual Studio .NET? If so, you'll need to do
a little fixing. Use the Help Index to look up "installing Internet
Information Server". Midway through the software requirements, you'll find
instructions telling you how to install IIS. It also provides advice on
configuring and repairing IIS after installing Visual Studio .NET: Follow
the guidelines.
8.. Are the IIS security settings set up properly? You can check this by
launching the Internet Services Manager in Windows 2000, or Internet
Information Services in Windows XP (found under the Administrative Tools
option on the Programs menu). Navigate to your Web server, locate the
Default Web Site node, right-click and select Properties, choose the
Directory Security tab, and select Edit. Ensure Anonymous Access and
Integrated Windows Authentication are checked, then OK on all open dialog
boxes.
9.. Is the Web application virtual folder set up correctly? You can check
this by launching the Internet Services Manager in Windows 2000, or Internet
Information Services in Windows XP (found under the Administrative Tools
option on the Programs menu). Navigate to your Web server, expand the
Default Web Site node, and then find your application folder in the list. If
it looks like regular Windows Explorer, it hasn't been set up correctly. To
resolve, right-click on the folder, select Properties, click the Create
button, and then hit OK to save.
10.. And finally, the most obvious of them all: Is the URL for the project
correct? Ensure both directory and extensions are accurate-and attempt to
browse the list of available files, where appropriate.
Hope it helps,
Cristhian
México
