GNU Radio Ettus N210 gives a signal of all 0s

Hello,

I am currently working with Ettus N210 and GNU Radio. I have a signal generator hooked up to a Basic RX daughterboard that is sending a 25 Mhz signal at -47 dBm. I followed the instructions here. I attached the grc file as well.

When I hit play, the graph that is output is nothing but a flat line set at a relative gain of 0. I am expecting some spike at 25 Mhz plus some noise.

What exactly is the cause of this problem and what can I do to start troubleshooting? Is there something wrong with the board or the way I am configuring it or with the gnuradio flow chart?

Thanks,

Joe