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MB300 communication with CI855 and AC800M

I have a problem with CI855 card and communications with AC450. I have configured the MB300 network numbers and node numbers correctily (I think). I can see the AC800M node number from 800xA in the RTA board system status screen. I see all the values sended from the AC450 in the AC800M with zero values, but I am not sure that the DS Send from the AC450 is being received in the AC800M because I see the VALID param as 0, so it seems that the DS is not being sended. Somebody can help me to solve this issue?
Thanks

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