LAN Time-out Problem

[Login23]

So, I've been playing with my brother on tekkit using the LAN feature, but, I have a problem with it. I'll just be going about my business, digging, crafting, building space stations, stuff like that, and then, I time out for no reason what-so-ever. We're in the same household, practically right next to eachother, using the same internet. Any idea what's causing this?

Thanks for any help!

EDIT: Oops, wrong section. Didn't notice.