Application Crash

I could play MKV files on windows 7 (build 7100) previously. However, as I installed the MKV Previewer, when I open a mkv file with Media Player, it crashes after playing 3 seconds.

Problem signature:<br />
  Problem Event Name:	APPCRASH<br />
  Application Name:	wmplayer.exe<br />
  Application Version:	12.0.7100.0<br />
  Application Timestamp:	49ee97f5<br />
  Fault Module Name:	DivXMFSource.dll<br />
  Fault Module Version:	1.0.0.30<br />
  Fault Module Timestamp:	4a0b1903<br />
  Exception Code:	c0000005<br />
  Exception Offset:	0002daa5<br />
  OS Version:	6.1.7100.2.0.0.256.1<br />
  Locale ID:	2057<br />
  Additional Information 1:	0a9e<br />
  Additional Information 2:	0a9e372d3b4ad19135b953a78882e789<br />
  Additional Information 3:	0a9e<br />
  Additional Information 4:	0a9e372d3b4ad19135b953a78882e789</p>
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