USRP2 and Simulink

Hy, I’m Massimo and I’m a Italian student. I have some problem with
USRP2 blockset of Simulink. When I run the simulation of the “demo”
example in Simulink, is shown me the following error:

"Board did not reply to a host query or configuration. Cannot run
simulation. Please ensure you have a connection by opening the block
mask and examining the Hardware section. "

I followed exactly the instructions on the following link:,

including Technical solution 1-CUN7JZ and 1-D2KBPZ. I update the
firmware and the FPGA on the SD card from the as suggested, but the
result has not changed. Can anyone tell me where am I wrong? Sorry for
my english.

Best regards, Massimo.