Windows Media Player issue with MPEG-4 movies

Hi,

Some of the movies I've been creating play OK in Windows Media Player but when you try and skip to a later part of the movie by holding and moving the toggle bar there is a 'Windows Media Player has a problem playing the movie' error. Others I've done don't have this problem. Is there something I've done wrong? All the videos are the correct length and file size. Is there a problem with the files and would it affect how they play on Vimeo? Do I need to do them again? What can I do differently?

Please help.

I didn't find the right solution from the Internet.

References:-
https://forum.corel.com/EN/viewtopic.php?f=1&t=48619
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Thanks