Bug: Missing argument 2 on line 28

Hi

I've just checked my log and it is full of php errors

Missing argument 2 for drigg_external_help() in /home/accountname/public_html/domainname/sites/all/modules/drigg_external/drigg_external.module on line 28.

If it helps I installed my drigg_external for 5.x successfully with the help of the guidelines given at http://socialcmsbuzz.com/drigg-external-vote-button-for-drupal-5-install...

I'm attaching my drigg_external.module in case it differs from your's