I have created a SOAP and REST service in a service package, which will create work objects for a case. after implementation, i tried without authentication and with basic authentication in service package. both these configurations were working fine. But when i tried to change the authentication type to oAUTH 2.0, i am getting error like "Service package using OAuth 2.0 should not contain services other than REST services.". So i tried creating a new SOAP service with new service package. In the service package configuration screen, i am getting BASIC and Custom options for selection but oAUTH 2.0 is not available.