I am checking my configs do to a similar problem...(in a different thread)
But in this thread I noticed that Dave Christensen had..
udr0 KD7UM-6 9600 255 2 Direwolf port
My axports has udr0 as the Winlink port, and that is the one selected in the wl2k.conf and in .wl2k/config.json
Is that correct? Just trying to troubleshoot.