flash media playback not playing local files?

hi

I want to use flash media playback http://www.adobe.com/products/flashmediaplayback/ to play some local FLV files on our intranet but it doesnt seem to work with local files

I can play this http://www.osmf.org/configurator/fmp/ but when i replace the source with something like test.flv then it doesnt play

Is this the case or I've done something wrong?

We cant download anything so I need a flv player that comes with Adobe

Thanks