Transporting allies

[KittensDieEveryday]

I'm creating a multiplayer map with different classes. One of these classes are supposed to be able to transport allies, but whenever I test it all the allied units do is following the transport unit. What do I do?

 

[Pharaoh_]

The transporting unit must have abilities like Cargo Hold, Load, Unload units. If it doesn't have them, it cannot function like that.