Sorry, my fail!
Are you using the current, updated version of GSE? Current version GSE_2.3.04.
Are you firing manually or automatic? Manually and with keyboard macro it doesnt work
Are you swapped to subtlety? Yes of course.
Does it fire some or not at all? Not at all.
Are other macros working for you? Yes the other macros work well.
Are you 110? Yes!
Are you playing beta or live-patch? Live-patch.