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You should first configure your environment variables on your both computer, Turtlebot and workstation. Put Turtlebot computer as master on both station with: export ROS_MASTER_URI=http://turtlebot_ip like:

export ROS_MASTER_URI=http://192.168.1.101:11311

In the workstation do also:

export ROS_HOSTNAME=workstation_ip

In your Turtlebot laptop:

export ROS_HOSTNAME=turtlebot_ip
export ROS_IP=turtleot_ip

even local-host should be defined explicitly.

Check those links for more documentation: http://www.ros.org/wiki/ROS/EnvironmentVariables http://www.ros.org/wiki/ROS/Tutorials/MultipleMachines