Clicks along a line

[barryb at libero.it]

I am trying to make the mouse click at fixed intervals along a straight line. So far, I have the following which 'compiles' without errors:

on RollEm
   click at "40,300" -- first point on line
   repeat 5 times
      move the mouseLoc relative "40,0" without waiting
   click at the mouseLoc 
   end repeat
end RollEm

Only the first statement works. At line 4 it throws the error:

Type    move: can't find object
Object    card id 1002
Line    move the mouseLoc relative "40,0" without waiting
Hint    RollEm

How should I script that repeat structure?
With many thanks in advance.
Barry Barber