Or, how/where do i define it's ID?
It should be in the embedding code that Flash published for the html page.
My bad on not checking this off as answered, turns out I check Adobe Live docs and it says
"Flash Player does not currently support SWF files embedded within HTML forms."
So I used their example from http://www.adobe.com/livedocs/flash/9.0/ActionScriptLangRefV3/flash/external/ExternalInter face.html#includeExamplesSummary to embed the swf and it works now