Please note that there are many types of MIFARE and confirm what your card type is exactly.
Suprema device does not read all kinds of MIFARE Card except the below card list.
Supported MIFARE Card List (Suprema MIFARE support devices)
1) MIFARE Classic
2) MIFARE Plus
3) MIFARE DESFire EV1/EV2 (DESFire EV2 cards are supported by having backward compatibility of DESFire EV1 cards.)
The Suprema device ignores reading the Card Serial Number of the unclassified card and the device does not react when you present the card on the device because the firmware only handles the above 3 card types.