gmr receive error

Hi all. My names are tyrus from Kenya, Africa. I managed to set up Osmogmr successfully but when I fired it up using the following commands, I receive the following error. tyrus@jedi-council:~/gmr_multi_rx$ ./gmr_multi_rx --gmr1-dl 941 -a RX2 -S A:0 --addr=usrp2 -T 10 linux; GNU C++ version 4.4.5; Boost_104200; UHD_003.004.002-159-g0d5cef73 Given gmr1-dl ARFCNs: 941 = 1554.406250 MHz Required bandwidth is: 31.250000 kHz Creating the UHD device... -- Opening a USRP2/N-Series device... -- Current recv frame size: 1472 bytes -- Current send frame size: 1472 bytes *terminate called after throwing an instance of 'uhd::runtime_error'* * what(): RuntimeError: fifo ctrl timed out looking for acks* Aborted I'm running off USRP N200 with a WBX board with UHD version 003.004.002-159. Any assistance will be highly appreciated. -tyrus