THX Stephen !
Dit moet het geweest zijn :
Why does the Player keep replacing library entries I delete?
The Player is monitoring a folder and replacing the entries in your library that point to files in that folder. For example, you may have copied the files to a new folder but didn't delete the original files from the folder that is being monitored. To prevent the entry from being re-added to your library, do the following:
1. Delete or move the files from the folder that is being monitored.
2. Perform the procedure in the previous question.
-or-
Right-click the invalid entry, and then click Delete.
The Monitor Folders feature is useful for automatically updating your library when media information in monitored digital media files changes. However, you must be careful to keep the list of folders monitored by the Player up-to-date to avoid invalid entries in your library. To specify folders for the Player to monitor, do the following:
1. On the Tools menu, click Options, and then click Media Library (Windows Media Player 9 Series) or Library (Windows Media Player 10).
2. On the Library tab, click the Monitor Folders button.
3. Do one or both of the following:
o To add a folder to the list of folders for the Player to monitor, click Add, select the folder you want the Player to monitor, and then click OK.
o To remove a folder from the list of folders for the Player to monitor, select the folder you don't want the Player to monitor, and then click Remove.
Now, when a change is made to the digital media files in a monitored folder, including digital media files that are added, removed, moved, or renamed, the media information in the library is automatically updated to reflect the changes to the digital media files in the monitored folders.
THX !!!
You're the best
Vladimir