You're welcome, sorry it doesn't really tell you what was going wrong so I wouldn't necessarily use that approach once you have invested a lot of time in patch maintenance using Update Manager. I've seen something similar happen which I suspect, but cannot prove, was down to corruption of a download on an HTTP proxy server, once the cache timeout had been reached a fresh copy downloaded. I've also seen something similar occur due to issues with the patch database/data and so the suggestion to reinstall. I'd recommend installing Windows Support Tools on your VC server and then using
tail - f C:\Documents and Settings\All Users\Application Data\VMware\VMware Update Manager\Logs\vmware-vci-log4cpp.log
to get a feel for what's normal for your Update Manager installation. Then it should be easier to spot when something comms related is going wrong.
Regards
Kenny