1-2-3 Drag& Relate Weblog - Stupid question

I am completly new in unification technologies so I have done all things decribed in the "1-2-3 Drag&Relate" weblog. Everything was fine but when I try the D&R example and began to drag this icon next to the id (table "Stores") in order to relate it into the "Sales" table, nothing is happening.

What am I doing wrong? (by the way, we are on EP 6.0, Stack 10)

Regards,

Frank