For loops help!

Hello i keep getting an error every time i run this code:

function EnemyShip::TestMissile(%this)
{
for(%i = 0,%i < 3,%i++)
{
%this.schedule(1000, "firemissile");
}
}

But if i run it without the "for loop" it doesn't give me any errors on debug, for example if i run it like this:

function EnemyShip::TestMissile(%this)
{
%this.schedule(1000, "firemissile");
}

The code above doesn't give me any errors and runs great!
So what am i doing wrong with the for loop operation and how can i fix it so it will run with a for loop?