Peoples...

I'm trying to write a simple read/write application for a Magnetic Card Reader/writer (Tyner) I'm able to get everything off the card just fine, and it appears to to be working to write. However, when I scan the card it reads like this:

I wrote to the card (first track only):
abcdefghijklmno pqrstuvwxyz

got back:
!"#$%&'()*+,-./0123456789:

Appears to be...