Erro ao pegar form no Struts 2

public class ProjectAction implements Preparable, SessionAware{

	private Project project;

public String execute() {
    if(project == null){
       System.out.println("project == null");
    }        	
        	return "form";
}

<s:form action="incProject" validate="true">

				<s:textfield id="projName" label="Project Name" name="project.name"/>
				
				
				<s:textfield id="internalId" label="Internal ID" name="project.internalId"/>
				<s:textfield id="clientId" label="Client ID" name="project.clientId"/>
				<s:textfield id="teste" label="teste" name="teste"/>
				
				
				<s:submit value="salvar" />
				
				
	</s:form>

public class Project {
 
	@Id
	@GeneratedValue   
	private Integer id;
	
	private String internalId;	 
	private String clientId;	 	 
	private String name;	
	
	@ManyToOne( cascade = {CascadeType.MERGE} )
    @JoinColumn(name="projectTypeId")
	private ProjectType type;	

     ....
}