I downloaded this baby yesterday I was so excited to play this game again... but something is wrong

I can't lock-on more than 1 target at the time... On the original N64 game, you can lock on as much as 5 targets. And on VC, I wasnt able to.

More details: Im olding up the A (fire) button, now the sight become red I target an enemy , it makes a beep and now this enemy is targetted. Then my sight change back to green and I can't lock on other targets anymore unless I shoot or the previously targetted enemy become out of sight.

I tried with the classic controller and the gamecube controller.. the same thing.

Any idea anyone?