NI-845x I2C Run Script.vi got error -30742. I cannot write or read

Hi All,

I am using Labview 8.5 and Ni-8451.

I got the error coded -30742 during writing data into MCU.
It works in Cypress IIC, but using Ni-8451 it won't work.
Please help me with... Why I got this error? Any idea?

Best Thanks.

Jessie