/ is always a command character. The one stored at $readini(mirc.ini,text,commandchar) is an additional command character, so you should check for both:

Code:
if ($left($1,1) isin / $readini($mircini,text,commandchar)) && (!$ctrlenter)


I've also changed mirc.ini to $mircini because the mirc.ini file isn't always in the mIRC directory.