mayavi not running

Dear,

After installation of mayavi I see the the following errors on running mayavi2 in terminal:

debabrata@debabrata-LIFEBOOK-A544:~$ mayavi2
Traceback (most recent call last):
File "/usr/local/bin/mayavi2", line 11, in
load_entry_point('mayavi==4.5.0', 'gui_scripts', 'mayavi2')()
File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 567, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2604, in load_entry_point
return ep.load()
File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2264, in load
return self.resolve()
File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2270, in resolve
module = __import__(self.module_name, fromlist=['__name__'], level=0)
File "/usr/local/lib/python2.7/dist-packages/mayavi/scripts/mayavi2.py", line 494, in
raise ImportError(msg)
ImportError: cannot import name provides
________________________________________________________________________________
Could not load envisage. You might have a missing dependency.
Do you have the EnvisageCore and EnvisagePlugins installed?

If you installed Mayavi with easy_install, try 'easy_install '.
'easy_install Mayavi[app]' will also work.

If you performed a source checkout and installed via 'python setup.py develop',
be sure to run the same command in the EnvisageCore and EnvisagePlugins folders.

If these packages appear to be installed, check that your numpy and
configobj are installed and working. If you need numpy, 'easy_install numpy'
will install numpy. Similarly, 'easy_install configobj' will install
configobj.

Please suggest.

Thank you