2dnav goal not work for me

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Hi, sorry for my english. I beginner in Ros and I'm trying to send a goal to simulated pr2 robot in gazebo. For this, I'm following SendingSimpleGoals tutorial. Previously, I've run the following commands in differents consoles:

roslaunch pr2_2dnav pr2_2dnav.launch

roslaunch pr2_gazebo pr2_empty_world.launch

rosrun pr2_tuckarm tuck_arms.py -r t -l t

rosrun map_server map_server map.yaml

roslaunch pr2_navigation_global rviz_move_base.launch

When I clic and drag "Set 2D Pose Estimated" the Pr2 move to indicated pose but when I clic and drag the "2D Nav Goal" the robot stands still

The goal topic is run:

rostopic list | grep move_base/goal

return move_base/goal

Anyone could help me?

Thanks in advance