Hi Femmina
i got the same problem running a 2003server box have the frame work installed and i still get the page cannot be found error?

dont know why. ill attach the documentation from microsoft:)
The following command installs the script maps pointing to the ASP.NET version associated with Aspnet_regiis.exe to the SampleApp1 application and all its sub-applications.
Aspnet_regiis -s W3SVC/1/ROOT/SampleApp1
The following command only updates the script maps for the SampleApp1 application, without affecting applications in subdirectories.
Aspnet_regiis -sn W3SVC/1/ROOT/SampleApp1
The following command installs the ASP.NET version associated with the tool and updates the script maps of all existing ASP.NET applications. Note that only applications that are currently mapped to an earlier version of ASP.NET are affected.
Aspnet_regiis -i
The following command installs the ASP.NET version associated with the tool, but does not update the script maps of existing ASP.NET applications
Aspnet_regiis -ir
The following command displays the status and installation path of all versions of ASP.NET installed on the computer.
Aspnet_regiis -lv