Problems with Dota being disconnected!!!

Whenever i play Dota on Lan, or ad-hoc wifi, the problem is that i keep on disconnecting from the game, but not the network... I have played complete games on it without disconnecting for a few times, but then dc'ng has become a major problem, all drivers are up to date

Connecting thru a router, ethernet, wifi doesnt help either...what should i do?

I'm am playing on macbookpro, the '09 edition