Dymo Letratag XR - NOT WORKING (Dartmouth Park N19)

This is a Dymo Letratag XR labelmaking machine from about 2002 (by the date on the instruction booklet). It is NOT CURRENTLY WORKING, though I've tried with new batteries (NOT included!). There are also two packs of label cassettes as shown in the photo; each includes one paper, one plastic, and one metallic tape. (There is a white plastic tape inside the machine.) Maybe someone can get it working, or can use the tape cassettes?