PIC Basic I2C Help Please

I am trying to read capacitance over AD7148 with PIC18F4550. I try to read any register from AD7148 but I always get $FF. What can be possible reasons for it?

Can anyone help me by writing a sample code specific to AD7148 just to read any register data.

Thanks..

How about you post your code so far, and maybe we can see the problem.

Thanks, I have solved it. The problem was related to ending I2C.

Hello.
Can You help me, show simple sample code for AD7148 via I2C? I can not read anyone register.