[Discuss-gnuradio] USRP2 with WBX and LP0926 to receive GSM spectrum

Hi We have received USRP2 with WBX and LP0926 PCB Antenna on 19 August,2010. We are trying to receive GSM spectrum ( Above 900MHz) but we are getting the error USRP2: Channel 0 not receiving USRP2: rx_samples(0 failed.   When we run the command sudo usrp2_fft.py -f 900M , we are getting the same error. Below 900MHz, the above mentioned command is working ( we are able to see the spectrum). Would you please guide us what the reason for error.   Best Regards   Zimran Rafique