Cron tab problems

After pointing the domain to another DNS for a few hours and then point it back, and I found cron tab not working anymore,

is there anyways I can fix this?

and is there anything wrong with my command line in crontab?

Code: 
* * * * * /usr/bin/wget -qO - http://www.mysite.com/cron_menu.php > /dev/null

it was supposed to execute that line every minute

help plz Cron tab problems

 

 

 

 

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