Stock 6 CD Changer Not wont play ?

Hi I have a Nissan x trail & my 6 CD player I cant find a name on it all i see is Sound Retrieval System it wont play when i push the Disc button nothing happens & when I push the Load button it goes to load but just stops & i have tried to eject the disc but it wont do a thing the last time I used it would be about 7 months ago & it was working fine but now all i get is radio there is no error message please help