Idoc Acknowledgements (How to request from third party)

Experts,

I have the following aysnchronous scenario:

Third Party --> Soap adapter --> XI --> Idoc adapter --> R/3

Once the Idoc is posted in R/3, I want the acknowledgements sent back to the Third Party system.

For this ALE was configured in R/3 and i executed the RBDSTATE program and it created the ALEAUD idoc and sent it back to XI.

The problem I am facing is that when I look in SXMB_MONI for the message that went to R/3, the "Ackn. Status" field is blank. Should this be populated in my scenario ?

The ALEAUD idoc on the R/3 side is green but It gets lost on the XI side. Niether am i able to see it on the XI side in WE05 nor am i able to see anything related to the Idoc acnowledgement in SXMB_MONI.

What am I missing that would populate the Ackn. Status field on the message that came from third party and went to R/3. Is this defined in the SOAP Adapter configuration or the URL ?

Here is the URL i am using:

XMB.TargetURL=http://<host>:<port>/sap/xi/engine?type=entry

(with the valid values for host and port)

I would appreciate any help in this regard.

Thanks

Ravi