OpenInviter is a 3rd party addon we have included in Contest Burner. We did not create the addon or functionality of it and are simply using it as a way you can get more participants in your contest. Due to this, we are slightly limited in the support we can supply for it.

Here are the most common issues:

1. When you unzip OpenInviter, depending on your settings and how it was unzipped, you can end up with a "Folder within a Folder" problem. This means that you have a folder called OpenInviter and inside of that folder, you have another folder called OpenInviter. If you upload this "outside" folder, the OpenInviter will not work or show up. Make sure you upload only 1 OpenInviter folder which then has inside of it, the actual files (conf, images, plugin, tmp, config.php, invite.php, LICENSE, openinviter.php).

2. The OpenInviter folder gets uploaded to the wrong location. The OpenInviter needs to be uploaded into your Contest Burner plugin folder (called contest). The path to this folder is laid out in your Contest Burner admin area, but will be the path to your Wordpress installation, then /wp-content/plugins/contestburner/. The final path should look like: /wp-content/plugins/contest/OpenInviter.

3. OpenInviter touch() error: "Warning: touch() [function.touch]: Utime failed: Permission denied".

Set permissions on:

wp-content/plugins/contest/OpenInviter/tmp to 777
and 
wp-content/plugins/contest/OpenInviter/tmp/oi_plugins.php to 666