I have tried to install my ATI 9.1 (latest build) on a single PC, installed the License Server before, impoting the serial worked fine. Checked that the License Server is up and running on the machine: Acronis True Image Workstation 9.1 Upgrade (German) -- 1/1 available This works fine with DNS, localhost, IP or 127.0.0.1 - and no, I don't use a firewall ... When I try to install ATI WS however it says that there is no valid license and/or no license server. The product was purchased as an upgrade from a former ATI 8. It's a pitty that a program I spent money on doesn't even install... Anyone an idea.