Looking for examples, BT CardReader

I have an O'Neil OC3 BT printer with integrated MSR, however I am not able to access the MSR via the CardReader object in RhoElements.

I've used the CardReader example in the CHM help file, and it works well for the integrated MC55, but not for an ET1 connected to BT OC3.

Do you have any examples of interfacing with any BT MSR?

Regards,