Hi, <BR>I just installed Visual Studio.NET, running on a Wind 2K Server machine. <BR>I try to Run a project and get the error <BR>"Error while trying to run project. Unable to start debugging on the web server. Catastrophic failure ..." <BR>I am logged in as an administrator. <BR>i have already tried iisreset and gone to IIS and checked that Integrated Windows Authentication was checked.<BR>still no luck.<BR><BR>Any suggestions?<BR>thanks<BR><BR>ps. I press 'Start Without Debugging', and it works fine.