This is a a stab in thin air, but..
Delete all temp files on your computer.
This helps to speed up your computer, and it might help with your problem. Although I highly doubt it, since it sounds like a connection issue, it doesn't hurt to try it.
If that doesn't work, we can come to the conclusion that the problem lies with LVP, and therefore I can't help you.
Have you tried other servers apart from LW's to see if you lag on them?
Delete all temp files on your computer.
This helps to speed up your computer, and it might help with your problem. Although I highly doubt it, since it sounds like a connection issue, it doesn't hurt to try it.
If that doesn't work, we can come to the conclusion that the problem lies with LVP, and therefore I can't help you.
Have you tried other servers apart from LW's to see if you lag on them?