Which mplayer are you trying to install? rc1 / rc2 / ??
If it is rc1, try downloading rc2, that should solve the problem.
Hope this helps.
EDIT: I just noticed you are using rc1 (.../MPlayer/Source/MPlayer-1.0rc1/...). This is an older version, like I said rc2 should solve your problem.
Last edited by druuna; 09-07-2009 at 05:14 AM.