In the new version of Xcode don't see any way to start IBAction when the segment is clicked.
Found it,
i just connected the segmentedControl to the IBAction as it was. The reason that it didn't work was that the thing that was giving error was actually some code inside the IBAction and not the link between the segment and the IBAction. Stupid me...
Sometimes you just don't see you own stupid errors :-(
Anyway many many thanks to David for trying to help :-)