__import__(name) ImportError: No module named fields

[ShivaGuntuku]

I'm trying to install Runbot in my odoo local system, followed every step explained here: http://www.odoo.yenthevg.com/installing-and-configuring-your-own-runbot/

downloaded current working runbot from https://github.com/odoo/odoo-extra and try to install the runbot module, giving an error like this import(name) ImportError: No module named fields. don't know why coming to this error and odoo not working if remove runbot module odoo works properly. is anything doing wrong