you have other code for your graph page as well. I think that is the noscript version, which woudl only appear if you have javascript disabled. You will have to add the wmode in all of the correct places.
The code you are referencing is missing the:
<param name="wmode" value="transparent" />
Which is used on some browsers, but more importantly it is missing it in the javascript code that is actually being used to display the flash.
Do you have a sample url. I believe the problem isn't really in the code you provided.