[Discuss-gnuradio] Problem in find_usrps and usrp2_fft.py on USRP N210

Hi All

I hope that u all r fine and doing good.  I have a problem in accessing
USRP N210. I installed UHD driver and all the images necessary. when i
run uhd_find_devices.py, it returns me
 
linux; GNU C++ version 4.4.3; Boost_104000;
UHD_002.20110127203211.8a62a20

--------------------------------------------------
-- UHD Device 0
--------------------------------------------------
Device Address:
     type: usrp2
    addr: 192.168.10.2
    name:
    serial: E2R10ZFUP

which means that the UHD driver is installed correctly. But when i try
to run find_usrps, i got "No USRP2 found". Secondly when i try to run
 usrp2_fft.py i get the following message:

Traceback (most recent call last):
  File "/usr/local/bin/usrp2_fft.py", line 273, in <module>
    main ()
  File "/usr/local/bin/usrp2_fft.py", line 269, in main
     app = stdgui2.stdapp(app_top_block, "USRP2 FFT", nstatus=1)
  File "/usr/lib/python2.6/dist-packages/gnuradio/wxgui/stdgui2.py",
line 36, in __init__
    wx.App.__init__ (self, redirect=False)
   File
"/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/_core.py", line
7978, in __init__
    self._BootstrapApp()
  File
"/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/_core.py", line
 7552, in _BootstrapApp
    return _core_.PyApp__BootstrapApp(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/gnuradio/wxgui/stdgui2.py",
line 39, in OnInit
    frame = stdframe (self.top_block_maker, self.title, self._nstatus)
   File "/usr/lib/python2.6/dist-packages/gnuradio/wxgui/stdgui2.py",
line 60, in __init__
    self.panel = stdpanel (self, self, top_block_maker)
  File "/usr/lib/python2.6/dist-packages/gnuradio/wxgui/stdgui2.py",
 line 81, in __init__
    self.top_block = top_block_maker (frame, self, vbox, sys.argv)
  File "/usr/local/bin/usrp2_fft.py", line 70, in __init__
    self.u = usrp2.source_32fc(options.interface, options.mac_addr)
   File "/usr/lib/python2.6/dist-packages/gnuradio/usrp2.py", line 679,
in source_32fc
    return _usrp2.source_32fc(ifc, mac)
RuntimeError: No USRPs found on interface eth0

Please help me in this regard.
 
Thanking all of you in anticipation.