Background won't work for each scenario when using tags

[first-developer]

Hi, guys,
Again thanks for your great work of providing a port of cucumber to python language.
Anyway I got an issue using 'tags' and 'Background' in my feature file. Ihave something like this:

@wip
Feature: Using Command class
    In order to execute queries through commands on the terminal
    As an administrator
    I need the Command class for this purpose 

    Background:
        Given I have a command


    Scenario: Create a command without queries
          And I have no queries
         When I request the number of queries on command
         Then I should get 0 as result


    Scenario: Create a command with queries
        Given I have a command
          And I have some queries:
          ...

When I run :

nosetests --with-freshen --rednose --force -v --tags=@wip tests/behavior

It runs only the first scenario using the 'Background' definition, not both scenarios.
Any ideas?

Thanks in advance