If you encrypted the media files on your media card using a media card encryption key and you are trying to open an encrypted
media file using your computer or a device other than the BlackBerry device that you used to encrypt the file, insert the media
card into the BlackBerry device that you used to encrypt the file. In the media card options, change the Encryption Mode field
to None or Security Password.
This is from RIM and there are other "possible" things to try.
Read this link but as stated above, normally you cannot recover but antthing is worth a try
page 155 for the top one http://btsc.webapps.blackberry.com/b...ListHelperImpl http://btsc.webapps.blackberry.com/b...ListHelperImpl