Reliance wi-max online multiplayer gaming problem

[sritce]

i am using reliance wi-max internet ..speed is 400kbps..every thing is good..but when it comes to online multiplayer gaming it sucks..very lag..y it hapens even in high speed internet.??.my ip is staic i guess 123.236.84.203..some say very high latency ..any one pls sugest some tips to over come lag...
Thanks in Advance