[Zope] cronjob problem

Hello all, The following cronjob is not working: 0,5,10,15,20,25,30,35,40,45,50,55 * * * * /home/mydir/www/Zope/z2.py -p /home/mydir/cgi-bin/Zope.cgi while the command "/home/mydir/www/Zope/z2.py -p /home/mydir/cgi-bin/Zope.cgi" is working in the shell, any suggestions how to solve this problem would be very welcome. regards, Jos van der Vleuten