Cron not working in drupal

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Heya people... I am using the Drupal Content Management System on my blog, and it seems to me that the cron on my site isn't working, though I don't know why. I believe that I have installed my site correctly though. Can someone tell me what to do to make my blog working? Thanks. I'm not sure if I can post links here, but you can find my blog link on my profile. Thanks for any help from any drupal users!!! Cheers, Nameless_