disconnected network, updates not have been downloaded

Hi,

For security reason, I deployed a WSUS in a disconnected network without joining domian. I followed this article exactly.
http://technet.microsoft.com/en-us/library/dd939873(v=ws.10).aspx

I have viewed most posts in the forum including copyed the subfolder from WsusContent. However, after importing the metadata and approving the updates, their status were downloading. The message said "The files for this update have not yet been downloaded. The update can be approved but will not be available to computers until the download is complete."

Please help!