Errno 5 #22

i try to use
network-comm/nic/ethernet/YT8512/example_network_eth_wan_yt8512h.py example and get

eth init start
Traceback (most recent call last):
File "/usr/example_network_eth_wan_yt8512h.py", line 35, in
File "/usr/example_network_eth_wan_yt8512h.py", line 21, in eth_init
OSError: [Errno 5] EIO

error