Here is a list of steps you can take to troubleshoot your printer not recognizing your memory card:

1. Verify that your printer and memory card are compatible.
2. Check the compatibility between your printer and memory card.
3. Test your printer with another memory card.
4. Check the connection between the printer and memory card.
5. Check the memory card reader and insert the memory card correctly.
6. Clean the memory card slot.
7. Check that your memory card is not damaged or faulty.