Regarding saving settings in u-center


This is a u-center question. I am trying to set-up the drotek SIRIUS GPS as the rover and XXL-RTK GPS as a base station. I am trying to manually configure the settings as given in:

After configuring the base station as shown in the documentation, I start working on the rover. However, once I reach the part after setting the measurement period - going to the message view, I am unable to change the setttings.

From the drop-down box, I select NMEA-GxGGA option, but the selection automatically reverts back to the RTCM3.2 1005 message or a similar one.

Has someone else faced the same error? Does anyone have any thoughts on why this could happen?