turn of acknowledgment for IDoc -> XI -> BAPI Scenario

Hi,

i have a smal BPM where i am sending an IDoc from an

<b>3rd PArty System -> XI (making some mappings) -> SAP</b>

everything works fine, but in the end i get a Errormessage in the

MessageMonitoring on my runtimeWorkbench.

the error occure when XI try to send an acknowledgeMessage

back to my 3rd Party System.

I there a way to turn the request for Acknowledgement of?

Thanks 4 help,

Benjamin