Not all ID printer ribbons are the same.  Just because it says YMCKT, doesn't mean it will work in your printer.  You must use the ribbon number - eg. 535000-003, or 534000-002.  They are both YMCKT (Yellow, Magenta, Cyan, Black, Topcoat) Datacard ribbons, but one is for the CD series printers, and one for the SD series.