Cyberglove left hand not able to connect

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Hi, I am using cyberglove with vizard, then when the right glove is connected, I can use the following code to connect to the glove
immersion = viz.add('immersion.dle')
glove = immersion.addCyberGlove()

But when using the left glove, I am not able to connect to the glove, the message shows:
** ERROR: Failed to connect to CyberGlove. Make sure Device Manager is running.
Could not connect to device.
** ERROR: Failed to create extension sensor with immersion.dle

So is there any difference connecting right glove from left glove?
Thanks.