Uable to control the turtlebot3 in gazebo simulation environment using teleop_key

edit

I am running turtlebot 3 in ros-noetic and trying to simulate the bot in a gazebo environment eg: roslaunch turtlebot3_gazebo turtlebot3_world.launch. I am able to see the terminal opening with the instructions on the keys to press for the robot motion but when i give the commands in the terminal through the keyboard press I cannot see the same getting reflected in the gazebo simulation ground. Can anyone help me on how to proceed ?. As of now I am trying to create a ros bag file and record the data after which my aim is to produce a map using cartographer and gmapping SLAM algorithms.

Any help in this regard will be very much appreciated.

thanks Vignesh