Falling at the first hurdle

Hi,
I can't even get the first part right!
After sourcing the SetPyRosettaEnvironment.sh script and starting ipython, I try:
from rosetta import *
I get:
ImportError Traceback (most recent call last)

/home/parcej/ in ()

/usr/local/PyRosetta-Release1.0-r33175.linux.32Bit/rosetta/__init__.py in ()
12 warnings.filterwarnings("ignore", "to-Python converter for .+ already registered; second conversion method ignored.", RuntimeWarning, "^rosetta\\.")
13
---> 14 import utility, core
15
16 import rosetta.utility

/usr/local/PyRosetta-Release1.0-r33175.linux.32Bit/rosetta/utility/__init__.py in ()
----> 1 from _rosetta_utility import *

ImportError: libpython2.5.so.1.0: cannot open shared object file: No such file or directory

Can anyone explain why I am an idiot aand getting this?
cheers
David