[ckan-dev] Error with pylons installing ckan 2.4

[David]

Hi.

Trying to install ckan 2.4 in fresh ubuntu 12.04 x64 I get next error:

Before making:
paster make-config ckan /etc/ckan/default/development.ini

I get error, because paster is not installed and I install using this 
command:

apt-get install python-pastescript

Later when I type:
paster make-config ckan /etc/ckan/default/production.ini

I get this error:

Traceback (most recent call last):
   File "/usr/bin/paster", line 4, in <module>
     command.run()
   File "/usr/lib/python2.7/dist-packages/paste/script/command.py", line

103, in run
     command = commands[command_name].load()
   File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 1989,

in load
     entry = __import__(self.module_name, globals(),globals(),

['__name__'])
   File "/usr/lib/ckan/default/src/ckan/ckan/lib/cli.py", line 12, in

<module>
     import ckan.logic as logic
   File "/usr/lib/ckan/default/src/ckan/ckan/logic/__init__.py", line 8,

in <module>
     import ckan.model as model
   File "/usr/lib/ckan/default/src/ckan/ckan/model/__init__.py", line 7,

in <module>
     import vdm.sqlalchemy
ImportError: No module named vdm.sqlalchemy

Any suggestions?
I have followed the steps in:
http://docs.ckan.org/en/ckan-2.4.0/maintaining/installing/install-from-source.html#postgres-setup


Thanks
David.