Getting SourceParty property on provider RoleLink

I have tried unsuccesfully to make the BTS.SourceParty property available on
my incoming RoleLink. If am certain the proper certificate authentication
has occured because the SourcePartyID is set to my Party PID and the
PartyName property is properly set and the SignatureCertficate property has
my certficate thumbprint. Howerver, when I access
RoleLink(Microsoft.XLANGs.BaseTypes.SourceParty) it always returns the
anymonous party
(\”s-1-5-7\”, \”OrganizationName\”). The same occurs for the PartyResolution
sample in the SDK. I have made my Host ‘Authentcation Trusted’.
Does this ever work, or am I missing something else?

Thanks,
craig