On the WF server, open the task tray tool.
At the top is a list of Severs. click on server: (local) and then edit
Change the Deployment Root URL to the FQDN of your server and click OK.
A little further down, you'll see a Workflow Server Configuration line with Workflow Server Setup in the box to the right. Click the elipses (...) on the right.
In the middle of that page you'll see Deployment Info: click the elipses (...) to the far right.
Chagne the Root URL to the FQDN.
DO NOT change any other lines on this page, only change the Root URL!
Click OK, the OK, then YES when it asks if you want to save your changes. This will require a restart of the logic base server extenstions to make it stick.
Rob