Webwork - UpLoad

Assuntos Gerais Agile
#1

Erro no UpLoad de arquivo.

JSP:

 <form action="gravarSenha.action" enctype="multipart/form-data"> 
      UpLoad <input type="file" name="arquivo">
      <input type="submit">
 </form>

Action:

 public class GravarSenha extends SystemAction implements ServletRequestAware{
 	HttpServletRequest request;
 	public String execute(){
              //********************  Erro ****** 
              MultiPartRequestWrapper wrapper = (MultiPartRequestWrapper) request; //Erro aqui linha 45
 	     File file = null;
 	     try {
 		file = wrapper.getFiles("arquivo")[0];
               } catch (Exception e) {
 				// TODO: handle exception
 		}
 		return SUCCESS;
 	}
 	public void setServletRequest(HttpServletRequest request) {
 		this.request = request;
 	}
 }

Erro:

 java.lang.ClassCastException: com.opensymphony.webwork.dispatcher.WebWorkRequestWrapper
 	br.com.clickideia.capacitacao.action.senha.GravarSenha.execute(GravarSenha.java:45)
#2