The NetCommunity Plugin URL within the Education Edge will need to be changed to include the fully qualified domain name.  
Format should be as follows: http://<domainname>/pluginservice/masterservice.asmx

To change the URL:

1. Click on the Options link in the NetCommunity Plugin
2. Select Service URL from the menu
3. Enter in the correct URL
4. Click OK

Note:  If you are unable to access the NetCommunity Plugin Options while logged in as a Supervisor, try logging in as a different user account.