Party and Service not defined

Hi ,

I am working on my QA box for my Idoc ->XI-->3rd party HTTP scenario. When I try to send a message I am getting "PARTY AND SERVICE not defined" error message. I am puzzled because the same scenario worked well in DEV box and I have set all the settings in the directory ( service w/o party for R3 LS, party with service for 3rd aprt, receiver agreement, receiver determinations, interface determinations) but still I get this error. The trace stops at the receiver split level. I checked the cache notifications in the directory they were all "RED" for change lists..is that a hint why I am gettting this error??

Any ideas....

-Teresa