If the server cannot bind to the port (correct number is 6891 by the way) this means that there is already a process listening on that port number or there is some other issue with your TCP stack.Originally Posted by contaygious
Make sure you aren't trying to run the program more than once. It installs itself in the startup group so it'll run when Windows boots. Have you tried to run it when it is already running? Are there two entries in the startup group? Have a look in task manager to see how many instances of ezsyncsrv.exe are running - should be only one.
If you're certain there is only one version running, try changing the default port number to a different value. Pick a similarly high number eg 7634. See the sticky for details of the registry setting to change. If you can get the server to start up with a different port number then this means there is already a process using the default port.