Marketplace adapter issue and question

Our scenario :

MarketPlace > XI MML Adapter

We have the following error :

No sender agreement configured in the XI Integration Directory for the given message header: SenderParty=OUR_PARTY; ReceiverParty=; SenderService=SERV_MarketplacePartner; ReceiverService=QALCLNT310; Interface=Order; InterfaceNamespace=urn:x-commerceone:document:com:commerceone:XCBL30:XCBL30.sox

We have used interface with specific names :

MIOA_Xcbl30PurchaseOrder (namespace : http://my_www.com/xi/B2B/Marketplace)

So the sender agreement that exist does not use the same interface name and namespace !

Is it a way to tell the marketplace adapter to use right interface and namespace names ?

Or I must re-create my interface objects with standard name Order under a standard namespace ???

Thanks a lot all