Can you Auto Shot your focus?

I use focus for DPS (or have done up until now). I switch toons by having five macros of the form:
Code:
/focus <toon name>
/follow focus
and my shot macro on each toon is:
Code:
#showtooltip Auto Shot
/cast [target=focustarget,harm,nodead]!Auto Shot
The lead character behaves as I expect but the followers only fire a single shot. The macro button is still flashing so it looks like Auto Shot is active but they don't shoot. I have to hit the button to get another shot out of them.