Can someone give me some direction in Windows Azure Active Directory

On my Windows Server 2008 R2, when trying to install Windows Azure Active Directory Module for Windows PowerShell i got the following error message
"In order to install Windows Azure Active Directory Module for Windows PowerShell, you must have Microsoft Online Services Sign-In Assistant version 7.0 or greater installed on this computer"
(although Microsoft Online Services Sign-In assistant version 7.0 is installed)

can anyone facing the same problem..