roslaunch pocketsphinx with machine tag

edit

I installed the pocketsphinx package on computer A, and tried to run it in various ways, (1) directly run on computer A, i.e., >> roslaunch pocketsphinx voice_cmd.launch. The recognizer node and voice_cmd_vel node can fully load and function well; plus the recognizer node will pop up a long list of info into the window. (2) from computer B, first ssh into computer A, then run >> roslaunch pocketsphinx voice_cmd.launch, and this also works fine as in (1). (3) from computer B, write a launch file to load voice_cmd.launch on computer A, with machine tag set to A. It becomes weird that the recognizer node hangs in the middle of popping out that long info list, and thus the speech recognition can't continue.

Any tips/suggestions are welcome