If you are using the easy social module in drupal 6 with a quirky (read rubbish) theme (or sometimes ubercart) then you may notice that the social media buttons don’t get displayed on some node types.
To get around this problem you may have to alter the node’s template to manually insert the Easy Social module’s output – and hence the social media buttons. Add the following to the relevant node template which can be found in your theme folder:
More information can be found here.
PS It’s high time you were using drupal 7! ;-)