Hi there, @LesKern 👋 Thanks for reaching out to ask your question here on the Seller Community! Happy to have you here.

So sorry about the trouble with your Magstripe Reader! We will do our best to assist.

Normally, in these instances we would ask that you flag this over to our Support Team for further troubleshooting. In this case, I would want you to make sure that you are physically tapping the blue Charge Tab before swiping your card - a common mistake we see when re-acquainting to the POS app. 

Let me know if that solves the issue for you! I will keep an eye out for your reply.