WSDL: No element type is defined for message

I'm creating a service orchestration using Eclipse BPEL Designer plugin and i have a problem with the WSDL file that it generates automatically. Here is the WSDL: ``` <?xml version="1.0" encoding="UTF-8" standalone="no"?> <definitions xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:plnk="http://docs.oasis-open.org/wsbpel/2.0/plnktype" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="http://ws.invocation.import" xmlns:vprop="http://docs.oasis-open.org/wsbpel/2.0/varprop" xmlns:wsdl="http://services.lolsystem.it" name="ImportOrchestration" targetNamespace="http://ws.invocation.import"> <plnk:partnerLinkType name="ImportType"> <plnk:role name="ImportRole" portType="wsdl:ImportServicePortType"/> </plnk:partnerLinkType> <import location="ImportModule.wsdl" namespace="http://services.italsystem.it"/> <types> <schema xmlns="http://www.w3.org/2001/XMLSchema" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://ws.invocation.import"> <element name="ImportOrchestrationRequest" type="tns:ImportOrchestrationReqType"> </element> <element name="singleEntry"> <complexType> <sequence> <element minOccurs="0" name="name" nillable="true" type="string"/> <element minOccurs="0" name="content" nillable="true" type="base64Binary"/> </sequence> </complexType> </element> <element name="ImportOrchestrationResponse"> <complexType> <sequence> <element name="result" type="string"/> </sequence> </complexType> </element> <complexType name="ImportOrchestrationReqType"> <sequence minOccurs="1" maxOccurs="unbounded"> <element name="file" type="tns:SingleFile"></element> </sequence> </complexType> <complexType name="SingleFile"> <sequence> <element name="name" type="string"></element> <element name="content" type="base64Binary"></element> </sequence> </complexType> </schema> </types> <message name="ImportOrchestrationRequestMessage"> <part name="payload" type="tns:ImportOrchestrationReqType"/> </message> <message name="ImportOrchestrationResponseMessage"> <part element="tns:ImportOrchestrationResponse" name="payload"/> </message> <!-- portType implemented by the ImportOrchestration BPEL process --> <portType name="ImportOrchestration"> <operation name="process"> <input message="tns:ImportOrchestrationRequestMessage"/> <output message="tns:ImportOrchestrationResponseMessage"/> </operation> </portType> <plnk:partnerLinkType name="ImportOrchestration"> <plnk:role name="ImportOrchestrationProvider" portType="tns:ImportOrchestration"/> </plnk:partnerLinkType> <binding name="ImportOrchestrationBinding" type="tns:ImportOrchestration"> <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/> <operation name="process"> <soap:operation soapAction="http://ws.invocation.import/process"/> <input> <soap:body use="literal"/> </input> <output> <soap:body use="literal"/> </output> </operation> </binding> <service name="ImportOrchestration"> <port binding="tns:ImportOrchestrationBinding" name="ImportOrchestrationPort"> <soap:address location="http://localhost:8080/ode/processes/ImportOrchestration"/> </port> </service> </definitions> ``` Now, the problem is that Eclipse for Eclipse validator the WSDL is well formed. I'm using Apache ODE as a BPEL engine, who is based on Axis2. The problemi is that Axis engine give me an error when i try to deploy my BPEL proces, and it is: "No element type is defined for message ImportOrchestrationRequestMessage" Does someone can give me some advice to understand this error and how to correct it? thanks in advance :)