who can help me to solve this problem

If your using limewire, it doesn't play videos, so you have to use a different player.

Try VLC media player. It has codecs built in and can play most file types. You can just drag & drop your files onto it and they'll automatically be added to the playlist. Other players should work similarly.

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If it ain't broke, fix it till it is!

It is possible to create a playlist within VLC, although I don't use that function myself. On the mac, you can drag & drop or add an entire folder of videos to the playlist. I presume it's similar for windows users.

Same for windows. Just drag & drop your files onto VLC and they are added to the playlist. Then you can manage them in by going to View>Playlists.

__________________
If it ain't broke, fix it till it is!