Problems with passing scores to LMS

Hi!

I have problems with passing scores to LMS. This code works in Opera, but doesn't work in Chrome and Firefox. Help me, please.

var player=GetPlayer();
var totalScore=player.GetVar("final_score");
if(totalScore<28){
onBWEvent("BW_UpdateStatus", "in_progress|~|"+totalScore+"|~|0|~|28|~|28|~|quiz");
}
else{
if(totalScore=>28){
onBWEvent("BW_UpdateStatus", "passed|~|"+totalScore+"|~|0|~|28|~|28|~|quiz");
}
}

lmsAPI.SetObjectiveScore('final_score', '28', '28', '0');