they began not to work last week
Since your account is in the middle of a server migration, it will be hard to figure out exactly what the problem was/is.
A cron command like:
Code:
/usr/bin/php /home/yadda/public_html/foo.php >>/home/yadda/public_html/log.txt 2>&1
will log any output or error messages, which can be helpful. If you add an echo command to your script, you can output debugging information.
Also, they are cracking down on cron jobs that run less than 5 minutes apart. If you had several jobs running that 'coincide' every so often, the system might have canceled them.