Cannot Play .DAT Movie Files in Real Player/Java Media Player

Hi,
I wanted to play some movie files in Solaris 10 (Was curious if the movie might be rendered more crisply in Solaris than Windows :) ) but found that .DAT files are not played in Java Media Player.
So I downloaded the Real Player for Solaris 10 x86 (The bin file which is a self executable installer). Now Real Player plays mp3 songs without a problem, just like Java Media Player, but it does not play any movies with a .DAT extension.
I thought may be I need to download a small patch and hence googled a bit, but could not find anything. So googled again to find if there was some work around, but could not come up with anything.
Has someone faced a similar problem? If anyone could help me with this, I would be really thankful.
P.S: I have boasted to my friends how good Solaris 10 is and if I get the .DAT movies working in Solaris 10, they will surely think of getting it installed on their comps cause it pretty much does everything else !!

That application is in the Applications -> Utilities Folder.
Change the popup menu under "Properties for" to Apple logo Built-in Output. And change the Source to Internal Speakers, and format to 44100.0 Hz with the downward pointing triangle next to the Hz rating.

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