asp.net solutions that cannot be debugged

If IIS is later installed, you need to first. NET executes the aspnet_regiis-i in the command tool, installs the ASP. NETFramework
Then check the configuration below:
If IIS is not installed later, check the following configuration directly:
1. Confirm "Enable ASP.net debugging" in "Configuration Properties" as "True"
2. Confirm the "Debug=true" in your "Web.config"
3. If you have installed the wind2000 SP4, you will be executed at the command line "regsvr32 i aspnet_isap.dll"
4. View site information in IIS, select Directory security, include anonymous access and authentication control, and then click Edit ... to confirm that the Integrated Windows Authentication option is selected
5. In the IE option-> "security Setting"-> "Custom Level" has "the user checks", confirms that selects "Automatically uses the current username and the password to log in"
6. Change the Username=machine in Machine.config file to Username=system
7. You can debug by attaching a process. Add W3wp.exe to the test
Or give it a try Aspnet_regiis.exe-r