Cannot download and install openerp-tools on Ubuntu 12.04

I am a newbie and was following a tutorial to do installation on Ubuntu 12.04

this is the error I am getting:
/trunk$ bzr cat -d lp:~openerp-dev/openerp-tools/trunk setup.sh | sh
Permission denied (publickey).
ConnectionReset reading response for 'BzrDir.open_2.1', retrying
Permission denied (publickey).
bzr: ERROR: Connection closed: Unexpected end of message. Please check connectivity and permissions, and report a bug if problems persist.

The tutorial I followed was http://www.altinisik.net/component/k2/i ... ll-and-run

I have uploaded my ssh public keys to launchpad.

Any help is appreciated

Try changing to a non-secure URL like I did below.

tom@kansas:~$ bzr cat -d http://code.launchpad.net/~openerp-dev/openerp-tools/trunk setup.sh

http://code.launchpad.net/~openerp-dev/openerp-tools/trunk/ is redirected to https+urllib://code.launchpad.net/~openerp-dev/openerp-tools/trunk/
# So that people can just type
# bzr cat -d lp:~openerp-dev/openerp-tools/trunk setup.sh | sh

bzr cat -d lp:~openerp-dev/openerp-tools/trunk openerp-dev/Makefile > Makefile
bzr cat -d lp:~openerp-dev/openerp-tools/trunk openerp-dev/Makefile_helper.py > Makefile_helper.py

echo to setup your development environment and download the sources, type
echo - for OpenERP v6.0:
echo make init-v60
echo - for OpenERP v6.1:
echo make init-v61
echo - for OpenERP trunk:
echo make init-trunk
echo - for OpenERP latest stable and trunk:
echo make init