@shreeit
please reply to questions 2. and 4.
Instead of starting the project, click on the 'Preview Clip' icon. If there is any AviSynth error message in the screen, please report it here. Thanks.
@rendez2k
Yes, it could be. New 2.3.1 Alpha has the option to use NTSC->PAL 4% speed up using AssumeFPS instead of DGPulldown. Just activate 'Preferences'/'Use PAL SpeedUp for NTSC-film to PAL' before adding your mkv to the project.
Let me know
Bye