ROS Master Communciation Error - BeagleboneBlack

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Our setup: Laptop running Ubuntu, serially connected to a BeagleboneBlack running Debian Wheezy. From the laptop, SSH-ing serially into the BBB is successful. Roscore is running on latop.

However, when any ROS command is attempted while SSHed into the beaglebone, the following error occurs:

ERROR: Unable to communicate with master!

On the beaglebone:

echo $ROS_MASTER_URI
http://localhost:11311

where localhost is 192.168.0.105

On the laptop:

echo $ROS_MASTER_URI
http://localhost:11311

where localhost is once again 192.168.0.105 (the IP address of the laptop)

To debug, we try running roswtf on the BBB and receive the following error:

root@beaglebone:~/twf_catkin_ws# roswtf
Loaded plugin tf.tfwtf
No package or stack in context
================================================================================
Static checks summary:

Found 1 warning(s).
Warnings are things that may be just fine, but are sometimes at fault

WARNING You are missing core ROS Python modules: rosinstall -- bloom -- rosrelease --

Found 1 error(s).

ERROR Not all paths in PYTHONPATH [/root/twf_catkin_ws/devel/lib/python2.7/dist-packages:/root/catkin_ws/devel/lib/python2.7/dist-packages:/opt/ros/hydro/lib/python2.7/dist-packages] point to a directory:
 * /root/catkin_ws/devel/lib/python2.7/dist-packages

================================================================================

ROS Master does not appear to be running.
Online graph checks will not be run.
ROS_MASTER_URI is [http://localhost:11311]

Being new to ROS, we are confused as to the relationship between the PythonPath and how the BBB communicates with master. I realize these two could be unrelated. Any help or suggestions is greatly appreciated!