Ok, in the xgui, go to groups>superadmin (assuming you're superadmin) Click Manage Permissions and go to Cmds-Menus. Make sure the check box IS infact checked. If it is solid green instead of the faded green, go to groups>user and enable it the same way.
Next, go to the MOTD Settings in Settings>Server>ULX General Settings. MAKE SURE the Second check box is selected, the first one is optional. Type in your MOTD URL:
http://motd.ftwgamer.com/cr-rules.php into the box.
Finally, proceed to type "!motd" in the chat or type "ulx motd" in console or of course, navigate to motd through !menu
> And as you can see on my screen, it works just fine.