I'm not quite following you...
You say in your previous post that it only backed up 'Gameserver', but in your last post, you say "It find GameServer and does the backup of UbuntuServer and WinAP".
Which is it? Does it back up the Ubuntu and WinAP or no?
Is that log you posted complete, or is there more to it?
Check your settings and make sure [Backup all VMs?] is set to [Yes], or that you have a list of VMs specified below that line.
What happens if you run the missing backups manually? Do they complete successfully, or is there an error?
Sorry, I'm a novice at this myself, just throwing stuff out that I ran into in my setup.