Fatal Error

Hi,

I just installed the plug in to my site. It installed no problem but when I go to the the admin page (Settings > Codepeople Post Map) the box which should contain the different marker icons is just an orange box saying

“Fatal error: Call to undefined method CPM::_all_post_thumb() in C:\wamp\www\test\wp-content\plugins\codepeople-post-map\include\functions.php on line 390”

Any idea what this means? I’m using wordpress version 3.4.2

Thanks

http://wordpress.org/extend/plugins/codepeople-post-map/