SparkFun Venus GPS with RTKLib

Hi!

I’m trying to use the SparkFun Venus GPS module with RTKNavi, but it’s not receiving any GPS signal.

The GPS module is connected to the USB port of my PC using a CP2102 (TTL to USB converter), and it’s working perfectly with the GPS Viewer.

I also realized that when I change the "Message Type"in GPS Viewer to binary, it doesn’t show information about the GPS satellites signals, but it still shows the coordinates (and it keeps updating them).

Do you know what could be the problem?

Thank you very much!