Summary

When you install Web Access 8.0 or 8.1 on a 64-bit version of Microsoft Windows that is running IIS 6.0 (Windows Server 2003 and Windows XP), you may receive the following error message when loading Web Access:

Service Unavailable

Cause

By default, IIS 6.0 on a 64-bit version of Windows Server 2003 and Windows XP may be configured to run in 64-bit mode. However, because Web Access 8.0 and 8.1 are 32-bit ASP.NET 2.0 applications, you must configure .NET 2.0 to run in 32-bit mode.

Resolution

Perform the following steps:

1. Click Start and click Run.
2. Type the following and click OK to configure IIS to create 32-bit worker processes:

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

3. Click Start and click Run.
4. Type the following to install the necessary ASP.NET 2.0 script maps:

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

5. Set ASP.NET 2.0.50727 to Allowed in the Web Service Extensions list in Internet Information Services (IIS) Manager.

Related Links

Please see the following Microsoft Knowledge Base article for additional information.

http://support.microsoft.com/kb/894435