Question : Access Share Point files from OWA 2007

Hi everyone
I have Server 2008 with EX 2007.
I have enabled the Direct File Access feature both on the Public and Private computer file access tabs. Both Windows file shares and SharePoint services check boxes are marked. I am able to access all file shares from OWA when typing \\servername, but not Sharepoint files.
I am able to access my sharepoint portal.
My question is: Is that even possible, and if so what am I missing?
I have already read this article:
http://technet.microsoft.com/en-us/library/aa998576(EXCHG.80).aspx

Answer : Access Share Point files from OWA 2007

Can someone else help here?