Update from VIDEO_CCK problem

Hello,

I have updated from Video_CCK to embedded media field,
but i cannot activate or desactivate the providers, it keeps the video_cck ones.
I've try in this admin menu :
[Embedded Media Field configuration -> Media settings -> Embedded Video Field -> providers]

It seems to keep only the old settings, and no way to update it.
I just want to activate some new providers, can someone help me ?

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For installing embedded media field , I've done this in the following steps :
i first desactivate video_cck module
then i delete the video_cck folder
then i copy the new emfield folder to the module folder
i run update.php which told me that

The following queries were executed
video_cck module
Update #1

    * DELETE FROM {cache_content}
    * DELETE FROM {cache_views}

Update #2

    * DELETE FROM {cache_content}
    * DELETE FROM {cache_views}
    * DELETE FROM {cache}

Update #3

    * The Embedded Video Field allowed provider variables have been updated.
    * DELETE FROM {cache_content}
    * DELETE FROM {cache_views}

Update #4

    * The old Embedded Video Field allowed provider variables have been cleaned up.

Update #5

    * DELETE FROM {cache_content}
    * DELETE FROM {cache_views}
    * DELETE FROM {cache}

and then i go to the module manager to activate it.