can not use cronjob

[pongdechs]

please help.

my can not use cronjob

/usr/local/bin/php -f /var/www/vhosts/domain.com/httpdocs/sendmail.php or httpdocs/sendmail.php

/usr/bin/wget -q -O /dev/null www.domain.com/sendmail.php ( can use in plesk 9 linux but plesk 10 not working)

php -f /var/www/vhosts/domain.com/httpdocs/sendmail.php or www.domain.com/sendmail.php



will error command No such file or directory