It might be the Haali splitter causing the problem - try disabling 'Explorer integration' and 'Try to open linked files' options in the Haali splitter settings.
There's also a more recent version (beta?) of Haali here - http://haali.net/mkv/mkx.y.9.exe
Tony
I don't know if it will help, but if this is MP 1.0.2 you could try updating the mediainfo.dll to a later version (MP uses this to get info on the file before playing it) - get it from MediaInfo - Download
As for logs, see the link in my sig below...
Tony