Your music probably needs to have been put on the Sansa in MSC mode. Was it? Or were you using MTP, which may mean that the Samsung can’t see any music?
Your music may need to be in the root directory of the Sansa, which is whatever the driveletter is. Not in a Music folder. Is it?
Have you tried contacting Samsung, or looking in a user forum? They’re the ones who should understand their connectivity settings.
