Hello Chris,
maybe this helps (from
http://download.microsoft.com/download/9/a/e/9ae0f6cc-7032-408e-9ca7-989f9e4af4ec/dotNetReadMe.htm):
2.1.4. .NET Framework 3.5 installation might not configure IIS correctly on Windows XP or Windows Server 2003
Installation of .NET Framework 3.5 will not configure IIS correctly on Windows XP or Windows Server 2003 if IIS is already installed and the IIS Admin Service is disabled.
To resolve this issue:
Do the following things after you install .NET Framework 3.5.
1. On the Start menu, click Run.
2. Type "cmd" and then press ENTER.
3. Type "sc config iisadmin start= auto" and then press ENTER.
-or-
1. On the Start menu, click Run.
2. Type "services.msc" and then press ENTER.
3. Select the IIS Admin Service from the list. If the Startup Type is Disabled, right-click IIS Admin Service and then click Properties. Change Startup Type to Automatic.
4. In %WINDIR%\Microsoft.NET\Framework\v3.5\, run WFServicesReg.exe /c. (On 64-bit computers, the path is %WINDIR%\Microsoft.NET\Framework64\v3.5\.)
Best greetings from Germany
Olaf