SD-Card always shown as "empty"


I bought an eight gig sandisk sdhc-card, formated it with FAT32 on windows - because my Sansa Clip+(8G) doesn’t offer to do this, only with the internal flash memory - copied some mp3-files to it, and put it into the player.

–> “refreshing your media” —> afterwards going to “Music” -> “Folders” -> sd-card -> shows “empty”…ALWAYS, nevermind how I format the card or what files I copy to it. USB-Mode was and still is MSC, the files are all shown in Windows7, but the player pretends that the card is empty, the card itself is recognized, that’s not the problem. I am running the latest FW.

How can I get the Sansa to recognize my files ???