Vivotek PTZ not working

Just giving Xeoma a try in Ubuntu.
It finds my Vivotek PD8136 camera automatically and displays PTZ control on the image but they do not work? Anything I can do to fix this? (PTZ controls do work in Vivotek software.)
It finds my Vivotek PD8136 camera automatically and displays PTZ control on the image but they do not work? Anything I can do to fix this? (PTZ controls do work in Vivotek software.)