Flash - JS communication from CD ROM

I am delivering Flash content (embedded in a HTML page) from a CD-ROM.

The Flash makes calls to JS that is in the HTML (e.g. AS code = getURL(“javascript:openGlossary()”) )

FF and IE do not seem to be happy with this functionality. Off my HDD, it works fine, but not when the content is burned and played from the CD-ROM.

Any ideas?

Cheers
Alfred

PS: The SWF is made for FP7