Just great when you waste half an hour figuring out why you can’t get your flash to run in fullscreen mode 
To save you the time and frustration, here is why it didn’t work:
You can’t use the allowFullScreen = true and wmode = transparent together 
Somehow the flashplayer is not smart enough to simply make the background opaque when you set the player to fullscreen mode.
Lets hope they fix this in the next player update…
Trust me.. I have looked and looked for workarounds.. nothing yet. And the worst part as well is that wmode window makes the flash player on top of everything. Needless to say since flash has been under the custody of adobe it has some new features but a lot of bugs. Note to Adobe: Don’t release anything until it has most of the bugs fixed.
ya but there has to be some solution well can we find whether that player is playing in full screen mode or not
means if it is not in full screen mode just add wmode=opaque in it else do not put that
can any body help