LAN Lag

[atlantis2112]

Hello everyone! (First post, woohoo)

I've been having some trouble on my LAN. I've got 2 PCs that I want to connect to the server. My PC works fine, wonderful, next to no lag. The other PC that my friend is on can only connect to the server half of the time, and sometimes when it does, it gets the Flashing Red Lag symbol, and takes about 20 minutes to dock with a jumpgate:(

But other times, it works completely fine, with no problems whatsoever. Both PCs appear to have the same Internet IP.

Any suggestions?