Installing or switching ASP.NET versions on x64 platforms

When installing SQL 2005 on an x64 server, I came across the following warning:

32-bit ASP.Net is Registered. Required 64-bit ASP.Net to install Microsoft Reporting Services 2005(64-bit).

This article explains how to install and enable the correct version of ASP.NET for x64 platforms to fix this error.

After you install the ASP.NET redistributable packages, you can switch between the different versions of ASP.NET. To do this, follow these steps for each ASP.NET version:

---

ASP.NET 1.1, 32-bit version
To run the 32-bit version of ASP.NET 1.1, follow these steps:
1. Click Start, click Run, type cmd, and then click OK.
2. Type the following command to enable the 32-bit mode:

cscript %SYSTEMDRIVE%\inetpub\adminscripts\adsutil.vbs SET W3SVC/AppPools/Enable32bitAppOnWin64 1

3. 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:

%SYSTEMROOT%\Microsoft.NET\Framework\v1.1.4322\aspnet_regiis.exe -i

4. Make sure that the status of ASP.NET version 1.1.4322 is set to Allowed in the Web service extension list in Internet Information Services Manager.

---

ASP.NET 2.0, 32-bit version
To run the 32-bit version of ASP.NET 2.0, follow these steps:

1. Click Start, click Run, type cmd, and then click OK.
2. Type the following command to enable the 32-bit mode:

cscript %SYSTEMDRIVE%\inetpub\adminscripts\adsutil.vbs SET W3SVC/AppPools/Enable32bitAppOnWin64 1

3. Type the following command to install the version of ASP.NET 2.0 (32-bit) and to install the script maps at the IIS root and under:

%SYSTEMROOT%\Microsoft.NET\Framework\v2.0.50727\aspnet_regiis.exe -i

4. Make sure that the status of ASP.NET version 2.0.50727 (32-bit) is set to Allowed in the Web service extension list in Internet Information Services Manager.

---

ASP.NET 2.0, 64-bit version
To run the 64-bit version of ASP.NET 2.0, follow these steps:

1. Click Start, click Run, type cmd, and then click OK.
2. Type the following command to disable the 32-bit mode:

cscript %SYSTEMDRIVE%\inetpub\adminscripts\adsutil.vbs SET W3SVC/AppPools/Enable32bitAppOnWin64 0

3. Type the following command to install the version of ASP.NET 2.0 and to install the script maps at the IIS root and under:

%SYSTEMROOT%\Microsoft.NET\Framework64\v2.0.50727\aspnet_regiis.exe -i

4. Make sure that the status of ASP.NET version 2.0.50727 is set to Allowed in the Web service extension list in Internet Information Services Manager.

---

ASP.NET on Windows Server 2008
The bits for the correct platform of ASP.NET on Windows Server 2008 are included in the OS cache. To install ASP.NET on Windows Server 2008 (x86 or x64) follow these steps:

1. Run Server Manager
2. Select Roles and click Add Roles
3. Select Web Server (IIS). Click Add Required Features if prompted
4. Select ASP.NET in Role Services and run through the rest of the wizard to complete the installation

If the Web Server (IIS) role has already been installed on your server, do the following to add ASP.NET:

1. Run Server Manager
2. Expand Roles and select Web Server (IIS)
3. Click Add Role Services in the right-hand pane
4. Add the ASP.NET role service and run through the wizard to complete the installation