Open Stack

Hi all,

When i installed Openstack by devstack, i was stucking in following
condition.

[...]
Downloading/unpacking prettytable (from -r
python_keystoneclient.egg-info/requires.txt (line 2))


It just got stuck here... and not moving forward.

Has anyone ever got the same problem? How did you solve this problem?
Please give me some suggestions. Thanks a lot in advance ;-)

-- 
Thanks
Harry Wei