Problemns to debug ASP.NET

[marcelo]

When I try to debug my ASPX application, I receive this
Error message:

Error while trying to run project : Unable to start
debugging on the web server. System Call failed

Somebody knows what is, and how I resolve this?

 

[Alvin Bruney]

Have you ever been able to debug an asp.net application? If not then you
probably have debug set to false in your property pages. Change it to true.

 

[Marcelo]

The documents is blank,
If you have, please forward to me ok?