SBS 2011, Console Updates not showing

I have an SBS 2011 server where WSUS appears to be working, if I look at WSUS in Admin tools, but the console is not showing updates for the clients. Updates show for the server itself.

I've checked the things suggested here -> http://technet.microsoft.com/en-us/library/dd443475(v=ws.10).aspx and all seems to be set correctly.

Any suggestions as to where I look to dig a bit deeper.

Thanks

Ken