rekordbox with Wacom tablet

I normally use a Wacom tablet (on a Mac) instead of a mouse and I feel very comfortable with and of course I use it with rekordbox too. But unfortunately it was impossible to press the [matching] button in both two player modes, Expert and Performance.

All other functions are working very well (btw. all functions in all other applications). After changing to a mouse I could related two tracks manually ... ahem ... I tried it again the tablet and again with a mouse and again with the tablet and again and again. Finally I have no idea why it isn't possible with a pen (tablet)...

I know that this post isn't really important but if someone has the same mannerism like me, here is the solution --> use the f**king mouse!! :-) :-)