MSA 2312fc two controllers do not work together.

[Rid]

Hello!
The problem consists in the following!
MSA 2312fc dual controller. One controller, and midplane has been replaced,
At connection of two controllers there is a conflict and they do not work simultaneously.
It is possible to start MSA with one controller, but  work only 6 SATA 1 TB disks from 12, at connection more than 6 disks the controller reboots.
Why controllers are not works simultaneously, and why at connection more than 6 disks, the controller reboots?
Somebody please help!

Thanks!

Controller A Versions
---------------------
Storage Controller CPU Type: Turion MT32 1800MHz
Storage Controller Code Version: M112R14
Memory Controller FPGA Code Version: F300R22
Storage Controller Loader Code Version: 19.009
Management Controller Code Version: W441R35
Management Controller Loader Code Version: 12.015
Expander Controller Code Version: 1112
CPLD Code Version: 8
Hardware Version: 56

Controller B Versions
---------------------
Storage Controller CPU Type: Turion MT32 1800MHz
Storage Controller Code Version: M112R14
Memory Controller FPGA Code Version: F300R22
Storage Controller Loader Code Version: 19.009
Management Controller Code Version: W441R35
Management Controller Loader Code Version: 12.015
Expander Controller Code Version: 1112
CPLD Code Version: 8
Hardware Version: 56