[color:"orange"]so what can i do then?[/color]
You will need to find an MMO game engine that you can use/license or find an MMO game that you like that can be modded. The second option would probably be faster and require less programming, but presumably without much low level access there may be restrictions on how much you could add or change from the original design.
A modding or game programming forum/group may have more specific advice (I don't program or play MMO games).