I can not run SST on Ubuntu 10.04

Hi All,

I just installed a new Ubuntu 10.04 and I am trying to install SST on it.
I installed it using these commands
    $ sudo apt-get install python-pip xvfb
    $ sudo pip install -U sst
and got successful installation result.

But when I ran a simple test, I got this error

pamies@Simba:~$ sst-run mytest
Traceback (most recent call last):
  File "/usr/local/bin/sst-run", line 9, in <module>
    load_entry_point('sst==0.2.4', 'console_scripts', 'sst-run')()
  File "/usr/lib/python2.6/dist-packages/pkg_resources.py", line 299, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python2.6/dist-packages/pkg_resources.py", line 2229, in load_entry_point
    return ep.load()
  File "/usr/lib/python2.6/dist-packages/pkg_resources.py", line 1948, in load
    entry = __import__(self.module_name, globals(),globals(), ['__name__'])
  File "/usr/local/lib/python2.6/dist-packages/sst/scripts/run.py", line 29, in <module>
    from sst import (
  File "/usr/local/lib/python2.6/dist-packages/sst/runtests.py", line 27, in <module>
    from sst import (
  File "/usr/local/lib/python2.6/dist-packages/sst/loaders.py", line 26, in <module>
    import unittest.loader
ImportError: No module named loader

I would be grateful for any tips and pointers to resolve this problem.
Thanks in advance,

BR Ayo.