Party resolution with certificates and WSE3

Hello,
I’m having a problem doing BizTalk 2006 party resolution with orchestration published as WSE 3.0 service. I used the WSE3 adapter from twoconnect to publish the orchestration. I’m getting the following error:

\”X509 token required for party resoulution not found in the message context.\”

I set up a \”party\” in BizTalk and set the corresponding certificate. And I know all my certs are installed correctly because if I disable party resolution the orchestration starts successfully, however SourcePartyID is always the anonymous value s-1-5-7. Are there any known problems with WSE 3.0 adapter for party resolution using certificate, or is there something else I’m forgetting?

Any insight appreciated,
-dave