Use the -p <ip-address> command line option when starting qtvomp.
update:
use the ip-address directly, not the name, as it doesn't resolve it.
./qtvomp -p 127.0.0.1
This is a limitation of vompserver at the moment (it blocks the port and only answers on this port).
No workaround possible from my side (at least not that I'm aware of).
Ok, now rethinking it: In case this port is blocked, the assumption that VDR is running on the box should be >99%.
So in the next version I will adjust the check so it then uses the localhost address by default (with a messagebox explaining it).