Has someone already succesfully used the ni i2C library to read/write an eeprom with ni pxi 6551 on labview?

Hi,
I'm trying to read/write an eeprom with an i2c protocol and ni pxi 6551 module.
At first, I tried to simply read the eeprom, because i know i am expecting 11111111 as a response, but it did not work.
So I tried something easier, and I succesfully wrote a pcf8574ap.
But i can't read it.
Seems like I am not able to "hear" the answer; when the sda line should be filled with an 8bit information, it remains at Z-state.
And because I am using the i2c library, i think there might be a problem with this library, or i am doing something wrong.
Hoping someone has an answer.
Johanna

I think the best place to ask your question in this thread
I2C Digital Waveform (IDW)
Now is the right time to use %^<%Y-%m-%dT%H:%M:%S%3uZ>T
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