There should be a folder on your server:
\\SERVER\Software\Home Server Connector Software , which contains the most current connector software. If it doesn't, it's possible that at some point you removed this folder, or moved it, or restored an old backup of the software share which overwrote the newer version.
This FAQ describes how to recover the folder if it's missing; possibly that will help.
Before you do this, however, what are the version numbers shown in the console, Settings tab, resources view, for the Windows Home Server components?
I'm not on the WHS team, I just post a lot. :)