I create simple content type in SPDesigner. After that I gave all privilegies to that content type (in CA->BDCService; for my user account). Also this content type has both necessary (ReadItem and ReadList) methods. Problem: I can see for example list (with live data) which include this external content type in page preview BUT when I want to create new sync connection for UP sync and I wanna choose BDC entity, external content type picker give me error "External Content Types are not available. contact your system administrator".
Please, any suggestion?