problem on running the "SimpleService_P1_Client"

[Amine El idrissi]

I get an error message when i run the class "SimpleService_P1_Client" after
running in the class "SimpleService_P1_Service". The error message is showed
in the attached image file. the wsdl file i use is also attached.
so how can i resolve this problem.
-- 
El idrissi Amine
Ingénieur en génie logiciel ENSIAS 2011
0672978951

<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/";
	xmlns:tns="http://ttdev.com/ss"; xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/";
	xmlns:xsd="http://www.w3.org/2001/XMLSchema"; name="SimpleService"
	targetNamespace="http://ttdev.com/ss";>
	<wsdl:types>
		<xsd:schema targetNamespace="http://ttdev.com/ss";>
			<xsd:element name="concatRequest">
				<xsd:complexType>
					<xsd:sequence>
						<xsd:element name="s1" type="xsd:string" />
						<xsd:element name="s2" type="xsd:string"/>
					</xsd:sequence>
				</xsd:complexType>
			</xsd:element>
			<xsd:element name="concatResponse" type="xsd:string"/>
		</xsd:schema>
	</wsdl:types>
	<wsdl:message name="concatRequest">
		<wsdl:part element="tns:concatRequest" name="concatRequest" />
	</wsdl:message>
	<wsdl:message name="concatResponse">
		<wsdl:part element="tns:concatResponse" name="concatResponse" />
	</wsdl:message>
	<wsdl:portType name="SimpleService">
		<wsdl:operation name="concat">
			<wsdl:input message="tns:concatRequest" />
			<wsdl:output message="tns:concatResponse" />
		</wsdl:operation>
	</wsdl:portType>
	<wsdl:binding name="SimpleServiceSOAP" type="tns:SimpleService">
		<soap:binding style="document"
			transport="http://schemas.xmlsoap.org/soap/http"; />
		<wsdl:operation name="concat">
			<soap:operation soapAction="http://ttdev.com/ss/concat"; />
			<wsdl:input>
				<soap:body parts="concatRequest" use="literal" />
			</wsdl:input>
			<wsdl:output>
				<soap:body parts="concatResponse" use="literal" />
			</wsdl:output>
		</wsdl:operation>
	</wsdl:binding>
	<wsdl:service name="SimpleService">
		<wsdl:port binding="tns:SimpleServiceSOAP" name="p1">
			<soap:address location=" http://localhost:8080/ss/p1"; />
		</wsdl:port>
	</wsdl:service>
</wsdl:definitions>