This could also be a permission problem. Remember that CGIs usually run under a different, unprivileged user, typically nobody, wwwrun, or apache. asterisk complains only that it could not connect (to the unix domain socket / pipe /var/run/asterisk.ctl). It does <update>NOT</update> say that /var/run/asterisk.ctl does not exist, but it asks you to check that it exists because missing that pipe / socket seems to be a common error.

Alexander