Why won't my 3-CD set play the CDs?

My Crosley 3 tray CD player will not start when a CD is inserted. The 3 disk tray sounds like it's operating correctly, but the CD will not play whether I push the start button on the front of the player or push the remote. When the CD doesn't start playing, the set then switches to the next CD. It continues to rotate through the 3 CDs but will not play. This is a 4 in 1 retro Crosley player with a turntable, AM/FM radio, cassette player and 3 tray CD player.
Thanks