I have made a new model from scratch, I have followed the following tutorial.

http://www.generationrobots.com/blog/en/2015/02/robotic-simulation-scenarios-with-gazebo-and-ros/

In Gazebo, I have tried to run the robot with:

rosrun turtlesim turtleteleopkey /turtle1/cmdvel:=/awctest/cmdvel

and

rosrun turtlebotteleop turtlebotteleopkey /turtlebotteleop/cmdvel:=/awctest/cmdvel

And, In Gazebo under "world/Models/awctest/left_wheel" I can see the the wheels are moving the frame when I press the keys; forward, backward and so ford, but the robot doesnt move at all.

Do you think I shall uninstall and install Gazebo?? or what can be wrong?

I appreciate any help :)