Ableton microkorg tempo

[tom_el_camino]

Hi guys,
I have a ozone m-audio keyboard which is connected via midi to my pc.
I want my microkorg"s arpegiator to slave to the tempo of ableton, but i can't get it to receive the signal on the microkorg.

the m-audio has 2 midi ports: Keyboard and USB.
the microkorg has 3 midi ports: in, out and thru.

can anyone help me, i tried to follow the manuals of maudio and microkorg, but it can't get it to work.
I can record audio perfectly in ableton, but i always have to change the speed manualy to sync (thank you live 7 for the tempo nudge)

thanks for you help.