I never tried my hands at online features yet, so I can't help.
But maybe you should say how you tried to do it yourself so that people can point out what you're doing wrong?
Look for these downloads:
MMORPG Example
SmileyHouse Pre-Alpha
If you are new to programming, it may be better to try some simpler projects first. The MMORPG is a very cool concept, and it's fun to make your own one, but MMORPGs are generally big projects and it will take longer to see results than a simpler one like a platformer.