Can you provide more details?
First, and the most important, what do you want to do exactly? In your previous posts you didn’t explain clearly what is the problem
What is the source video (DVD, avi, H.264… or whatever)?
Where did you find subtitles? Did you created from the original DVD or did you find them somewhere in the net?
What format are subtitles? Are subtitles located on an external file or embedded in the video file?