PROBLEM
ASP.NET vxxxxx does not appears in IIS Web Services Extension, how to fix IIS mappings.
CAUSE
If you install Microsoft .NET Framework before the IIS installation you don't have the IIS Web Services Extension mappings.
RESOLUTION
Execute the register command for each versions :
%windir%\Microsoft.NET\Framework\[VERSION]\aspnet_regiis.exe -i
regsvr32 %windir%\Microsoft.NET\Framework\[VERSION]\aspnet_isapi.dll
Sample :
%windir%\Microsoft.NET\Framework\v1.0.3705\aspnet_regiis.exe" -i