Hey Kbrooking,

It could be that the device is still connected as a device within mcStudio which could negate its ability to send out SIGFOX messages.

Can you try:
-   Load your programming either wirelessly or via USB serial connection
-   Remove the USB from the mcDemo205 and close mcStudio
-   You can then plug the device back in via USB to provide power or power the device from batteries

This should allow you to get SIGFOX messages back as the device would then be in a state of running independently. Does that make sense? Let us know how that goes