Problems with SAP Logon ticket

Hi.

I am trying to send SAP Logon ticket from ECC 6.0 to the backend legacy using Soap adapter in receiver side. I get the following error in SXMB_MONI, so it looks like AF is not accepting the ticket. Can anybody tell me please, how I can identify that the ticket has been received in PI's side?

<Trace level="1" type="T">Principal Propagation connection attributes</Trace>

<Trace level="1" type="T">Host = hostname</Trace>

<Trace level="1" type="T">Port = 12345</Trace>

<Trace level="1" type="T">Transport protocol = HTTP</Trace>

<Trace level="1" type="T">Transport protocol vers = 1.0</Trace>

<Trace level="1" type="T">Message protocol = 003000</Trace>

<Trace level="1" type="T">Path = /MessagingSystem/receive/AFW/XI</Trace>

<Trace level="1" type="T">Security: Logon Ticket</Trace>

<Trace level="1" type="System_Error">Error while sending by HTTP (error code: 403, error text: Forbidden)</Trace>

</Trace>

Thanks, Jukka