Playing mp4 in javaFX and Windows7

[Ananda Sen]

I have created an mp4 player in javaFX. It is playing mp4 videos fine in XP and Vista, but in case of Windows 7, the video is getting played in a new popup window. Please help how to prevent this popup from coming and play mp4 videos in the player. I am using Combined Community Codeck Pack, for codec.