Test that GNU Radio works with the USRP after Installation

Hi,

I am new in GNU RAdio. After the GNU Radio installation on my Ubuntu
8.04,
when I try to test that GNU Radio works with the USRP I obtain the
following:

wsn@wsn-desktop:~/Escritorio/gnuradio$ ls -lR /dev/bus/usb | grep usrp
crw-rw---- 1 root usrp 189, 642 2009-01-19 19:32 003
wsn@wsn-desktop:~/Escritorio/gnuradio$ cd gnuradio-examples/python/usrp
wsn@wsn-desktop:~/Escritorio/gnuradio/gnuradio-examples/python/usrp$ *
./usrp_benchmark_usb.py*
Traceback (most recent call last):
File “./usrp_benchmark_usb.py”, line 30, in
from gnuradio import gr
File “/usr/local/lib/python2.5/site-packages/gnuradio/gr/init.py”,
line 43, in
from gnuradio_swig_python import *
File
“/usr/local/lib/python2.5/site-packages/gnuradio/gr/gnuradio_swig_python.py”,
line 23, in
from gnuradio_swig_py_runtime import *
File
“/usr/local/lib/python2.5/site-packages/gnuradio/gr/gnuradio_swig_py_runtime.py”,
line 6, in
import _gnuradio_swig_py_runtime
ImportError: libgnuradio-core.so.0: cannot open shared object file: No
such
file or directory
wsn@wsn-desktop:~/Escritorio/gnuradio/gnuradio-examples/python/usrp$ cd
usrp/host/apps
bash: cd: usrp/host/apps: No existe el fichero ó directorio

Besides, Before that, when I installed GNU Radio I obtained the
following:

*The following components were skipped either because you asked not *

*to build them or they didn’t pass configuration checks: *

*gcell *

*gr-gcell *

*gr-audio-jack *

*gr-audio-osx *

*gr-audio-portaudio *

*gr-audio-windows *

*gr-comedi *

*These components will not be built.
*

Is it correct? Could anyone help me, please?

Thanks in advance.

José Carlos*
*