Making a unit shoot

[Putin]

I want a unit to shoot. I do this through the command:
unit fire "weapon","ammo","type". This I put in a script and make him shoot the whole time through a loop.
But the unit looks up into the air and then shoots. How can I make him shoot straight?
Thanks

[david-p]

the unit needs to know what to shoot at.
unit dotarget unit2
the only consideration is that the units only force fire against other units or vehicles.

[Putin]

Thanks but I tried that already. I have read something like this:
unit setdir angle

and if I change angle to 180 the unit turns around and then shoots up.But if I just write 45  or anything else it just keeps looking up and shoot