Direct connection to Tajima machine

Hello,
I'm trying to create a direct connection ( i.e. via a com port) from my computer running Wilcom software to my Tajima TEHX embroidery machine.
Unfortunately I haven't been able to transfer any designs.

Has anyone been able to send designs to a TEHX using a direct connection and if you have, how did you do it?

Regards,
Ian
DJ Embroidery