Lag on one Ragnarok character

Weird Lag on one Ragnarok Character

It is really weird that only my main character lags in RO. This started when my character was upgraded to third job. Here are the things that I checked:

(Using the same computer, same internet connection)
- Tried other character on the same account, no issues
- Tried other character on a different account, no issues
- Tried these characters on the same map, effects are off, no issues

However, I tried using my main character on another computer, there is no lagging issues. It seems like main character lags in just one computer. Any ideas how to fix this? Any idea as to why it only happens to my main character?

Your advise is greatly appreciated.