SQL Server Configuration Manager – Cannot connect to WMI provider – Invalid class [0x80041010]

look at this post am getting the same

http://social.msdn.microsoft.com/Forums/en-US/sqlkjmanageability/thread/4c8ca86c-105f-4f0a-ac18-6e33dda2bc46

but when I tried the solution given there , It is not working

the error I am getting is mofcomp is not recognized as internal or external command

I tried in  C:\program files\Microsoft sql server\90\shared  and in Windows\system32

I am getting the same error