Thanks,
I am not sure yet about other IO pins. I do have buttons on 2 other IO ins 41 and 43, but found I was short on parts. Order with those should arrive next day or so.
I do have a 10K PU resistor connected to IOREF voltage and the IO line side of the button. The other side of button connected to ground. I have also tried with configuring the pin as INPUT_PULLUP, no difference.
Thanks
Kurt