V2.7 no thumbmails with embed code

[paulfrance]

Hello
I have installed V2.7 all is ok if i upload a video as an user i have a thumbnail created.
But each time that i try to use the admin function "add flv embed "i have no thumbnail created.
It is also not possible to create a thumnail by editing the video. i have only" edit and delet options " for the videos added by that way.
For videos donwloaded i can creat a new thumb.

For your information i have all the server requirements and i use other videos scripts that working well.
Thanks for your help

ps : i have found probably the error it is in the path/
Uploaded videos with the user login vshare have thumbnail in the folder: thumb/4ca4238a0b/
Embed videos by administrator on the main page have the path :/thumb/1_21.jpg (and 1_21.jpg not created and not in the folder)

So for me it is a bug of the script with the path

All the problems for me are with the admin function i have tried 5 installs and always the same probs