It might have to do with the external chat.
(a possible solution, not guaranteed) Go to Start, then type Graphics Settings. Browse Maplestory.exe, then change settings to Power Saving.
I hope that helped.
Hey guys, I have resolved this issue.
For anyone else who might have a similar problem, it might be a stuck character. The best way to resolve it, is to submit a ticket and a GM will be in contact with you within 1-2 business days.
Take care!