GetEntityExists not work for Player

[Rapture]

Is their any way to get it to recogonize a player?

if (GetEntitiesCollide("Player", "DeepWaterAbove") == true)
{
DrownCounterNumber = 0;
}
else
{
DrownCounterNumber++;
}

I have a timer setting off every 0.25 seconds. But it always returns as false. But if I change Player to a armchair entity name (that I placed down) the function will be true and set the number back to 0. Why does it not work/support for Player?