Error detecting the USRP

hey everyone ,

I was trying to check my usrp using

benchmark_usb.py

but i got a msg :
esting 2MB/sec… Traceback (most recent call last):
File “./benchmark_usb.py”, line 106, in ?
main ()
File “./benchmark_usb.py”, line 96, in main
ok = run_test (rate, verbose)
File “./benchmark_usb.py”, line 63, in run_test
usrp_tx = usrp.sink_s (0, tx_interp)
File “/usr/local/lib/python2.4/site-packages/gnuradio/usrp.py”, line
227,
in init
_ensure_rev2(which)
File “/usr/local/lib/python2.4/site-packages/gnuradio/usrp.py”, line
82,
in _ensure_rev2
v = _look_for_usrp(which)
File “/usr/local/lib/python2.4/site-packages/gnuradio/usrp.py”, line
76,
in _look_for_usrp
raise RuntimeError, “Unable to find USRP #%d” % (which,)
RuntimeError: Unable to find USRP #0

on usbview ,it can detect the ursp as a high speed device
can some help??


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