CI920B replacement for CI920AB

Dear,

I´m facing trouble with CI920B replacement. I have exchanged CI920B by the newest one CI920AB, according manual 2PAA107378 (section 2.1.2 - Communication interface update without updating the physical layer). The point is, all Output units have worked well, however, all Input units are displaying Channel Error. I´m using 800xA System with HWD AC800M - S900IoCI854HwLib 2-0-0.

Does anyone know something that could help me ? Or some Known problem regarding this.

Thanks in advance