Gazebo initial view of the world : gui and ogre prefix not defined [closed]

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Hello,

I'm new to ROS and Gazebo. I am trying to change the initial world camera position in Gazebo but I'm facing the same issue described in this topic :

http://answers.ros.org/question/39862/gazebo-initial-view-of-world-my-renderinggui-fltk-tag-is-not-working/

When I'm launching Gazebo using the command :

$ roslaunch gazebo_test1 test1.launch

I noticed the Warnings :

Warning [parser.cc:348] Gazebo SDF has no gazebo element

namespace error : Namespace prefix rendering on gui is not defined '<'rendering:gui'>'

namespace error : Namespace prefix rendering on ogre is not defined '<'rendering:ogre'>'

Warning [parser.cc:245] DEPRECATED GAZEBO WORLD FILE On July 1st, 2012, this formate will no longer by supported Convert your files using the gzsdf command line tool You have been warned!

These warnings can explain my issue. Have you got any leads on how I can overcome this issue ?

I'm using ROS Fuerte and running on Linux 10.04 LTS.

Thanks in advance.

Edit: I installed ROS following the ROS installation tutorial for Ubuntu. Gazebo was already installed with ROS. I just recompiled the gazebo and gazebo_worlds packages

Gazebo is version 1.0.2