AD5700 problem

Hi, 
I'm trying to work with AD5700-1 according to CN-0382 circuit. I used internal oscillator and internal reference. When I connect 3.3V (feed from AD5421) to AD5700-1, I can't get any voltage or output on CLKOUT pin and voltage of REF pin is 1.7 V instead of 1.5V. Would you please help me to realize and solve the problem?

Thanks 