Can This be The cause of my Lag?

[rudkeja]

Hey guys, i've been lagging ever since i started playing Hero Which is weird because if I play any other game, I don't lag. And my other friends dont lag as well in HeRO. So i'm thinking that because I only Copied and Pasted the RO folder from my friend, maybe it's the cause of my lag? and would downloading it and installing it properly fix it?

EDIT: Btw, my download speed peaks at 205 kb/s if you were asking about my internet.