Thanks very much for your reply Marcus.
I forgot to add there was a 404 error just before the "cannot call method load_flowplayer" message. The 404 error is for following file:
Guillermo kindly directed me towards this article:
I disabled 'Use slash' option and the menus started working but the SCORM courses give 404 error for following file:
We are just using a standard legacy theme and no other non-standard plugins. We use Moodle to host SCORM courses for our users from a DotNetNuke site. We supply external authentication and enrolment parameters from a separate SQL server database.
P.S. Sorry for posting the issue multiple times as I am really desperate for a solution.