CLIENT_RECEIVE_FAILED 400 ICM_HTTP_CONNECTION_FAILED

Hi experts,

I'm working on Auto ID 2.1 Scenario <-> XI <-> R3

When I try to send messages from R3 to AII they arrive ok...

But in the other way from AII to R3 I get this error on AII sxmb_moni:

' Connection request from (12/95/0) to host: labxi, service: 8000 failed (NIECONN_REFUSED) Error when receiving by HTTP (error code: 400, error text: ICM_HTTP_CONNECTION_FAILED)'

I don´t know what to do because everything went ok but at this moment this is the situation..

Please help me!

Thanks and regards.