Can't. These issues are common. It all depends on the type of broadband connection the host and its users have. The game type and graphic rendering determines whether an active connection can keep up with a particular game.
You can stop yourself lagging by getting a faster broadband connection. But theres no way you can stop others from lagging.
ok thanks i was just wondering beccuase my friend had told me that its somethimes the chord or the tv just seein the other possibilities