ERROR: You are not allowed to run remote commands

Hi,
I’m making an own cpanel for my customers.
The problem is:

<?php $result = shell_exec("wget -O - --quiet --http-user=XXXX--http-passwd=XXXXX --no-check-certificate 'https://127.0.0.1:10000/virtual-server/remote.cgi?program=list-domains'"); echo $result; ?>

I got:
ERROR: You are not allowed to run remote commands

Pablo.