Hi,
you can run the autoconfiguration scripts to see if the button configuration is being generated or not:
/usr/local/fop2/autoconfig-buttons-freepbx.sh
that is for the buttons, you should see a lot of configuration data being printed on screen...
/usr/local/fop2/autoconfig-users-freepbx.sh
That will show you the list of available users... in that output check the last parameter, that is the "group" parameter to limit view, if the group is set incorrectly, you won't see any buttons when login in...