when I use the map editor and I click on one unit or building there's an option "Owner" to choose. when i click "yuri", I lunch the game with a skirmish and all that "yuri's" units are missing!. But if i click "Civil" all the units appear normally. I have the Red Alert 2 with the yuri's revenge expansion..
what's the problem??

it is a thing in the game; if you want to own the buildings then you have to create a trigger giving them to a player location or a country then they shouldnt disappear.