I had the same problems when I installed a system using Build 3719.

Support sent me an update which returned "Wrong Product Update", but when they realised I was using the Lite version they sent me an alternative update.

This worked a treat.

Whilst I don't seem to be able to attach them here, I have uploaded both to an area of my website - hopefully this will help others with the same issue.

For DSS Lite: http://www.nas.uk.com/OpenE/upd_0559-DSS_V6Lite.zip
For DSS (trial - untested by me): http://www.nas.uk.com/OpenE/upd_2009_9_9_2.zip

Simple instructions
1.Extract the UPD file to your local system
2.Login to the DSS GUI
3.Navigate to MAINTENANCE - SOFTWARE
4.Select the UPD file and select Apply
5.Reboot the server

Hope this helps.