SparkFun GPS-RTK2 Board - ZED-F9P (Qwiic) Problem..

I got this ZED-F9P board with the Ublox GNSS Multi-Band Magnetic Mount Antenna. If i use Bluetooth for the corrections input from a Base station with GPS & GLO with L1 &L2 Freq. I get into RTK Fixed after a Min or so That looks good!. But if i use a base station Ublox M8T with RTKLIB str2str to get the RTCM3 msgs. (1077,1087 ,1097 & 1005) about 20m apart I get RTK Float but not RTK Fixed?? I have waited a hour are so Never stay in RTK Fixed??? If I use RTKLIB Navi with the M8T as Base and F9P sending Raw Timing to RTKLIB navi i get RTK Fixed in a min. or so ALL looks good that way?? Is there some configuration in the F9P that i am missing? Or something else???

Thanks

Dennis