ADV7180 video decoder on the neek

Hi,

I am trying to to use ADV7180 video decoder on the NEEK board.I have writed an i2c module and decoder controller in order to modify the registers of the decoder.I am sure that both f the modules work properly.However I get i2c error,I can not communicate with decoder(no ack comes).can it be due to the mode of the max II device on the board?

what can be the problem?

thanks for your help.