How do I increase the connection limit for IIS 5.1 on Windows XP?

Make a command prompt window (start, run, cmd.exe) and issue these commands.

Step 1: cd \inetpub\adminscripts
Step 2: cscript adsutil.vbs set w3svc/MaxConnections 40
Step 3: iisreset

How to reset IIS?

Start-->Run--> Type IISRESET -->Press Enter Key.

How to register asp.net with IIS?

C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727>Aspnet_regiis.exe -i

aspnet_regiis -ir -enable - Installs ASP.NET version with root and enables it.
aspnet_regiis -s path - Registers script map for our Application.

if not registered then the user can able view the below screen..