Message Mapping buttons disabled
I have a problem when I want to map identical nodes within Message Mapping .
The problem is that the button "Map Selected Fields and Substructures if Names are identical" is disabled. Not only this button is disabled but all the buttons are disabled, I mean: 'Clear mapping', 'Data Flow Editor', 'Dependencies' and so on...
Obviusly, I'm working in edit mode.
The Xi is 3.0 and SP 20.
Why are these buttons disabled??
Thanks in advance.