TOPIC: Cron Reminder error

Running latest version of DT Register (3.0.8a) and PHP 5.3.4. I am trying to set up the reminder Cron job and am getting the following email from my cron manager. No email is being sent to the registrants.

<br />
<b>Notice</b>: Use of undefined constant __DIR__ - assumed '__DIR__' in <b>[SERVER DIRECTORY]/html/libraries/import.legacy.php</b> on line <b>15</b><br />
<br />
<b>Warning</b>: require_once(__DIR__/platform.php) [<a href='function.require-once'>function.require-once</a>]: failed to open stream: No such file or directory in <b>[SERVER DIRECTORY]/html/libraries/import.legacy.php</b> on line <b>41</b><br />
<br />
<b>Fatal error</b>: require_once() [<a href='function.require'>function.require</a>]: Failed opening required '__DIR__/platform.php' (include_path='.:/usr/local/php5/lib/php') in <b>[SERVER DIRECTORY]/html/libraries/import.legacy.php</b> on line <b>41</b><br />

I realize that this seems to be referencing a file outside of DT Register but I am hoping for some direction on repairing this.