Am I missing some files in Maplestory?

If you're using Windows 8.1, which I assume you are, you have the same issue I had. You need to do a FULL shutdown of your computer and it'll fix itself. http://www.howtogeek.com/129021/how-to-d...ot/?nxid=6

I did what you say and so far I can hear my items actually dropping and my gliding is fixed, which led me to believe all these problems I stated above must have been resolved.

Thank you.