Cron job problem in script

Hi !

Just installed script and tried to set up a cron job on my server but not working.

Getting message: External cron disabled in setup


Got following reply from my hosting provider Hostgator:

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This error is generated by your script, and not your system. Please check your script code and modify it as necessary to get the desired output.

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But I already tried to run cron job from http://www.webbasedcron.com/ and
there it works.

Can you suggest what could be modified within the script to work on my server ?

I did now and now works perfectly.

Thanks for help.