Problems with FM receiver

Hi,

I can’t receive FM radio.
I use GNU radio and the example FM receiver (https://wiki.myriadrf.org/Gr-limesdr_Plugin_for_GNURadio)
I don’t have anything but noise. I tried to change the parameters but the result is the same.
My antenna is connected to RX1_L.

If anybody has a an idea, it would be very appreciated.
Pauline