In this article, I will explain How to Deploy Dotnet Framework Multiple Version Like v1.1,v2.0,v3.5,v4.0 in IIS Server. ASP.NET 1.1 runs only in 32-bit mode.if you want to run ASP.NET 1.1 and ASP.NET 2.0 at the same time, you must run IIS in 32-bit mode. Here How to install different versions in IIS using Command mode..
How to Deploy Dotnet Framework Different Versions Like v1.1,v2.0,v3.5,v4.0 of IIS Server
Operating System - Windows Server 2003 , IIS Version - IIS 6.0
Operating System - Windows XP Professional, IIS Version - IIS 5.1
To open IIS Manager at a command prompt
On the Start menu, click Run.
In the Open dialog box, type inetmgr, and then click OK.
For IIS Settings
ASP.NET 1.1 runs only in 32-bit mode. ASP.NET 2.0 runs in 32-bit mode or in 64-bit mode.if you want to run ASP.NET 1.1 and ASP.NET 2.0 at the same time, you must run IIS in 32-bit mode.IIS 6.0 supports both the 32-bit mode and the 64-bit mode. However IIS 6.0 does not support running both modes at the same time on a 64-bit version of Windows.
ASP.NET 1.1, 32-bit version
To run the 32-bit version of ASP.NET 1.1, follow these steps:
Click Start, click Run, type cmd, and then click OK.
Type the following command to enable the 32-bit mode:
% cscript %SYSTEMDRIVE%\inetpub\adminscripts\adsutil.vbs SET W3SVC/AppPools/Enable32bitAppOnWin64 1
Type the following command to install the version of ASP.NET 1.1 and to install the script maps at the IIS root and under: