My preferred two programs for an RPG would be GameMaker7 or MacomediaFlash. Both can do damn good RPGs if you have the know-how. If you don't have the know-how then stop trying to do something you havn't got a clue with.
Although If you mean MMOrpg I suggest this:
http://www.freemmorpgmaker.com/index.php
If I only had a server to host on I'd have made something on it by now.