online game HELP!

[reece]

hello, i have a problem with my internet especially when i play starcraft on battle net. i have a really good comp with a 256dsl connection with firewalls turned off. but it lags extremly when i join a game that has more than 1 user, i can play a 1v1 no prob but with more it lags and on use map settings games if their is more than just the host in the game it won't let me download the map... please help me

 

[folken]

Try pinging a known good server such as google.
ping www.google.com -t
Let it run for a while, see if you have ping spikes/timeouts.

Run the DSLReports speed test and tweak test to see if anything seems out of the norm.
http://www.dslreports.com/tools