My Macbook Pro no longer recognizes my P2 card reader

I am trying to transfer P2 cards through my P2 Card reader (AJ-PCD2) into my Macbook Pro so that I can Log & Transfer through FCP 7.
This has always worked in the past. Now the computer will not recognize the P2 Card reader at all.
I have tried two different P2 card readers, both USB ports on the Macbook , 5 different USB cables and various P2 cards.
The mini USB 2.0 cable is plugged into the Signal port on the P2 card reader. The other end of the cable, which is a regular USB connector, is plugged into the Macbook's USB port. The P2 card reader is blinking green as usual but I do not get the P2 icon in the computer.
I have checked the Disk Utility file and finder as well.
My computer is 10.9.5 Mavericks
Also,I  tried this on a 10.8.5 IOS
Please help.

You need to go to the HP Printer Support web site and download the newest Lion-compatible printer drivers for your model of printer, and install them.
Hope this helps

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