NBA2K13 ONLINE LAG HELP PLEASE!!!!

when i am playing quick match the game is fast and there are no lags but when i play with friend in online association there are always lag... please help me i realy want to play in online league
by the way i have fps of: 72

NBA 2K13's online support still leaves something to be desired, so it may not be anything at your end. Having said that, just try the usual troubleshooting steps: make sure neither of you have anything running in the background and have performed a benchmark.

I have already done it.. please help

Again, make sure that you have both gone through those troubleshooting steps. If there are no problems at your end but problems at your friend's end, then you're still going to run into issues when playing them.

Failing that, like I said, NBA 2K13's online support does still leave something to be desired. If neither of you have any problems at your end, then you're looking at a server issue, which is 2K's problem and something you can't do anything about.