Is this the same card/player you posted problems with here 4 1/2 years ago? Were those problems ever resloved?
Just to cover all bases, the card is inserted all the way into the player, right? There is a spring-loaded mechanism in the card slot. You have to push the card in until it clicks, past the outside casing in most instances, using your fingernail. Pushing it again (until it clicks) releases it and the spring pushes it out.
Assuming the files you put on the card are supported formats (and the card is in all the way), it sounds like the problem may be with the player. If you have another card, try it in the Clip+. If it isn’t seen either, then the card slot/reader in the player is faulty.
