Can't Logon To Unite

I installed Comoco Unite on one PC a few days ago. I was able to create an account and logon to the server. Today I cannot log on. The logon screen just sits there with the Signing in … message. If I attempt to add a new account I get the message “Error to creat the engine”. Not great English, but I have the feeling that something is very wrong with my PC or with the service.

I have also tried this from other PCs on my LAN and get the same errors. The PC’s are all Win 7 64 bit.

Please advise.

fireewall protection. and check if UAC is disabled on windows.