The multiple file upload mod doesn't store the image filenames within the database.

The mod creates a directory for the files with a name to match the key value of the associated record.

When you modify or delete record it searches for the graphics within the directory it created when you added a record and not the database itself.

Are the images displaying correctly?

Unoffical DBMan FAQ

http://creativecomputingweb.com/dbman/index.shtml/