Keep in mind that the Disqus WordPress (WP) plugin is designed to replace your WP comment system wherever it is referenced within your templates. Any actions such as closing comments or removing references to the comment template within WP could result in Disqus not displaying properly.
Most WordPress irregularities are caused by theme or plugin conflicts. To test, we'd recommend the following:
- Reverting to a default WordPress theme
- Disabling all plugins
- Resetting the Disqus plugin - This can be done using the "Reset" button on the Plugin Settings tab within the Disqus WP plugin.
Common conflicting themes/plugins:
- These 2.0 (theme) - Resolution for this conflict.
- MailChimp's Social Plugin
- Facebook Connect
Comment counts not working, or code showing up in other plugins
Missing comments form or "Comments closed" error
Make sure comments are enabled within WordPress itself. See WordPress' Enable and Disable Comments guide.