What can I do for using the NI USB-8451?

Hello, I'm a Research Engineer in LG Display.
I have a questition.
I make a program for I2C communication by using the NI USB-8451 now.
A program is maked by VC++(MS studio 2008).
I want to read and write data of Gamma IC(BUF08821) made by TI.
When I excecute READ code , an error occured about device reference.
An error massege is " The device reference is invalid. Verify that the supplied device reference contains a valid device name."
I dont' know what is problem. I need help for solution this error.
LG Display Co.,Ltd.
[email protected]
Message Edited by bumlee on 12-17-2009 01:32 AM

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What can I do for using the NI USB-8451?

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