Call to undefined function: subscribed_form_publications_array() when registering

Get the following error when trying to register a new account with Enewsletter and associated modules installed;

Fatal error: Call to undefined function: subscribed_form_publications_array() in D:\WebRoot\drupal\modules\enewsletter\enewsletter.module on line 705

My server details are;

Drupal 4.6.5
PHP 4.3.11
MySQL 5.0.18
Apache 2
Windows XP