X2 sysex send problems

I seem to be having all sorts of little problems with X2. For instance, I have an old Korg X5 synth that I use to play wind controller patches. The patches are uploaded through sysex. On X1, I simply set up the synth to receive sysex, set up a midi channel in X1, went to sysex view, selected the patch and hit send. If I follow these steps in X2, the synth does not respond. I downloaded midi ox, and with everything else set exactly as with X2, I was able to send the sysex data to the synth. Why won't x2 send the data?