Ok ok guys, i figured it out about the Output process via the KONA 3 Card.
The thing i wasn't doing was to set the video playback output properly in FCP.
My timeline is 23.98 but i got to choose 29.97 as the video playback output in FCP, than in the FRAME BUFFER of the KONA 3 card in the AJA control panel i got to change it in 29.97 thats it !
Now the KONA 3 card give the option of outputting from the SDI out in 29.97.
THX a lot guys.