My Macbook is getting freeze when i connect with USB cable

After I updated to OSX 10.7.4 Lion (Default 64bit).I try to use the touch panel device that I using before. But it keeping occur system freeze when I connect the usb cable.
Sometime I can operate it normal but the percentage is very low.
What 's the problem on?

Could be a bad cable or the device isn't compatible with Lion and it is causing problems.

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