Redundancy in Control Logix System

I am having problem in synchronization of redundant chassis. As per redundancy bundle V15.57 package i have update firmware as below
Slot 0 Ethernet module 4.3.2
Slot 1 1756-L61 15.57
Slot 2 1756-CNB/E 11.02
Slot 3/4 empty
Slot 5, 6 1757-SRM 4.4

Well i have done the scheduling of control net..its working fine.. when i eject both ENBT card from both redundant chassis ...then both SRM module get synchronized. as soon as i inject these ENBT modules then SYNCHRONIZATION gets terminated. When i start synchronization from Rslinx then i get message......module configuration error......ENBT module has disqualified request for synchronization

I have upadate firmware of ethernet module many times...........Also i have changed the firmwares of all modules as per redundancy bundle of V15.60 but am getting same message
 
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