I got the latest SVN of mplayer and compiled it. The version is the following MPlayer dev-SVN-r23999-4.1.1. When I try to play the EVO file i got after i ran it through EVOdemux mplayer outputs the following:

[root@localhost ~]# mplayer -x 1280 -y 720 /storage/videos/kingkong.EVO
MPlayer dev-SVN-r23999-4.1.1 (C) 2000-2007 MPlayer Team
CPU: AMD Athlon(tm) 64 Processor 3700+ (Family: 15, Model: 39, Stepping: 1)
CPUflags: MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE SSE2
mplayer: could not open config files /root/.lircrc and /etc/lircrc
mplayer: No such file or directory
Failed to read LIRC config file ~/.lircrc.

Playing /storage/videos/file.EVO.
MPEG-PS file format detected.
Searching for VC1 sequence header... found
VIDEO: VC-1 1920x1080, 29.970 fps, header len: 33
vo: couldn't open the X11 display ()!
vo: couldn't open the X11 display ()!
VO XOverlay need a subdriver
[gl] using extended formats. Use -vo gl:nomanyfmts if playback fails.
vo: couldn't open the X11 display ()!
vo: couldn't open the X11 display ()!
[VO_SDL] SDL initialization failed: No available video device.
Can't open /dev/fb0: No such file or directory
[fbdev2] Can't open /dev/fb0: No such file or directory
VO: [ivtv] No such file or directory
DirectFB: Preinit entered

=======================| DirectFB 1.0.0 |=======================
(c) 2001-2007 The DirectFB Organization (directfb.org)
(c) 2000-2004 Convergence (integrated media) GmbH
------------------------------------------------------------

(*) DirectFB/Core: Single Application Core. (2007-03-18 21:00)
(!) DirectFB/core/system: No system found!
vo_directfb2.c <277>:
(#) DirectFBError [DirectFBCreate (&dfb)]: No (suitable) implementation found!

X windows is set to resolution of 720x1280.

any help?

Mplayer looks good as far as I can tell and it shouldn't have a problem opening that file type from what it is saying. I'd reinstall your video card drivers as it's having a problem opening up the main display.