Just a thought Phil ... you might try making this or some variation work using the Auto-enrol plugin.
http://moodle.org/plugins/pluginversions.php?plugin=enrol_autoenrol
Jenna
Just a thought Phil ... you might try making this or some variation work using the Auto-enrol plugin.
http://moodle.org/plugins/pluginversions.php?plugin=enrol_autoenrol
Jenna