UGN Security Forums UGN Security: Underground General No luhn Key?

Hi guys,

I am a newbie here, so bear with me

I have a smart card reader, tried to erase data in the card but the software prompts me ' No Luhn Key'. What does it mean and how to solve it?

Thanks ...

Didn't find much on it, maybe be more specific w/ hardware and software info. Here is a basic link describing what LUHN is:

http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci214514,00.html

Has anyone use ACE-CSC reader before? Any idea what's the pin out for the reader? Can't find it in google...