org.springframework.oxm.jaxb.JaxbSystemException: class x nor any of its super class

[naveen@123]

I'm using jaxb2,This is my spring context file

<ctx:annotation-config/>        
<ctx:component-scan base-package="my package name"/>
    
    <bean id="template" class="org.springframework.ws.client.core.WebServiceTemplate">
        <property name="marshaller" ref="marshaller"/>
        <property name="unmarshaller" ref="marshaller"/>
    </bean>
    <bean id="marshaller" class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
        <property name="contextPath">
            <value>my package name</value>
        </property>
        <property name="marshallerProperties">
            <map>
                <entry key="com.sun.xml.bind.xmlDeclaration">
                    <value type="boolean">false</value>
                </entry>
                <entry key="com.sun.xml.bind.namespacePrefixMapper"
                    value-ref="namespacePrefixMapper"/>
            </map>
        </property>
    </bean>
    <bean id="namespacePrefixMapper" class="prefix mapper package name"/>

I wrote a standalone java class,main method with code as shown below

ClassPathXmlApplicationContext context=new ClassPathXmlApplicationContext("spring-ws.xml");
		WebServiceTemplate template=(WebServiceTemplate)context.getBean("template");
		FCUBSREQENV fcubsreqenv=new FCUBSREQENV();
		String url="Endpoint";
		FCUBSRESENV fcubsresenv = (FCUBSRESENV) template.marshalSendAndReceive(url,fcubsreqenv);

My context path property has a package name where all my jaxb generated classes using xjc compiler are present. Spring context got created successfully.but when I try to run the standalone program I end up with "org.springframework.oxm.jaxb.JaxbSystemException: class FCUBSRESENV nor any of its super class is known to this context" Request you to let me know, Incase if I'm missing something.