HDLC Serial Port F

I am using HDLC mode Serial Port F in RCM6700 .At the receiver end i cannot receive any data.I am using external clock.The same was running in the RCM4010.But its not working in RCM 6700 .Please give some idea what’s wrong with the RCM 6700?

I am also using HDLC mode Serial Port F in RCM6700 and unable to configure the development kit in the receive mode, can you send me the code you have written for RCM4010 so that i can verify my program and can get a better understanding.