Error on Certificate Services Web Enrollment After Installing .NET Framework 1.1 on Windows Server 2003 R2 x64

I won’t recommend someone to do this. I meant the installation of .NET Framework 1.1 on Windows Server 2003 R2 x64 that includes only .NET Framework 2.0. Here I found the problems with the Certificate Services Web Enrollment, you may find other problems on your web applications.
This tip only to show you how to solve the problem on Certificate Services Web Enrollment after the installation of .NET Framework 1.1.

I installed .NET Framework 1.1 on Windows Server 2003 R2 x64 that includes only .NET Framework 2.0 in Add/Remove Windows Components.

The installation completed successfully, then the problem come when I run Certificate Services Web enrollment.

Even access to the Default Web Site or http://server-name returns errors.

To Resolve the Problem:
Open Command Prompt. Go to Windows\Microsoft.NET\Framework64\v2.x.xxx (replace x.xxx with the correct version of the .NET Framework installed). Type:

> aspnet_regiis -i

The Result of Previous Step:

I also got another problem when running Certificate Services Web Enrollment. You may find another error message like “Unexpected Error getting the templates list”.

How to Resolve the Second Error:
I have to Unregister and Register some DDLs

• regsvr32 /u scrdenrl.dll
• regsvr32 scrdenrl.dll
• regsvr32 /u xenroll.dll
• regsvr32 xenroll.dll

Then I can continue the certificate enrollment process till completed.

Note:
I can solve the problem after googling the related error message and found this answer.
http://social.technet.microsoft.com/Forums/en-US/winserversecurity/thread/a80a4eeb-d592-4d53-a1fc-3b0a993630f3