Hi mlai,
Glad to see you've figured out the problem. Yes, this is a known issue of
running IIS in 32 bit mode on a 64 bit Windows operating system.
The root cause of this issue is: when we run aspnet_regiis -i or
aspnet_regiis -config under Microsoft.NET\Framework directory, it will
screw up the 64bit registration for MMC, ASP.NET tab will disappear, i.e:
as long as 32bit aspnet_regiis is run, 64bit MMC won't work. If we run
aspnet_regiis -i -enable under Framework64, ASP.NET tab will show on MMC
again.
As the following Knowledge Base article described, the solution is to use
the command line tool to configure different versions of ASP.NET.
How to switch between the 32-bit versions of ASP.NET 1.1 and the 64-bit
version of ASP.NET 2.0 on a 64-bit version of Windows
http://support.microsoft.com/?id=894435
To configure on individual web application/virtual directory level, you can
run:
aspnet_regiis -s <path of the application>
(Install scriptmaps for this version at the specified path, recursively.
Existing scriptmaps of lower version are upgraded to this version.)
E.g. aspnet_regiis.exe -s W3SVC/1/ROOT/SampleApp1
OR
aspnet_regiis -sn <path of the application>
(Install scriptmaps for this version at the specified path,
non-recursively. Existing scriptmaps of lower version are upgraded to this
version.)
Have a nice day.
Sincerely,
WenJun Zhang
Microsoft Online Community Support
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