No se puede encontrar el método de escritura para el atributo:

Hello, I´m having the error "org.apache.jasper.JasperException: /autenticacion.jsp(28,0) No se puede encontrar el método de escritura para el atributo: name", my development IDE is Netbeans 5.0 and the JSP's are deployed in Tomcat Apache 5.5.9. As far as I know, the way to program the JSP is rigth , but obviously somethig is wrong.
The code in the JSP is:

<html:form action="Autenticacion" name="autenticacionForm" type="allthepackagesinthesystem.AutenticacionForm">

  <table width="400" border="0" align="center">
      <td colspan="2" bgcolor="#292829">
        <div align="center">
          <p><font color="#FFFFFF" face="Verdana">Autenticaci&oacute;n
          de usuario</font></p>
      <td width="41%"><div align="right"><font color="#FFFFFF" face="Verdana">Login</font></div></td>
      <td width="59%"><div align="left"><font color="#FFFFFF" size="5" face="Courier">
        <html:text property="usuario"/>
      <td><div align="right"><font color="#FFFFFF" face="Verdana">Password</font></div></td>
        <div align="left">
        <html:password property="clave"/>
      <td height="8" colspan="2"><div align="center"><font color="#FFFFFF" size="5" face="Courier">      
            <input name="Limpiar" type="reset" id="Limpiar" value="Limpiar">
        </font><font color="#FFFFFF" size="5" face="Courier">&nbsp;
          <input type="submit" name="Submit" value="Ingresar">
      <td height="8" colspan="2" bgcolor="#4D4A4D"><div align="center"><font color="#FFFFFF" face="Verdana">Digite
        sus datos para ingresar al sitio </font></div></td>

Thanks in advance!
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The name for the form is not necessary and will be determined from the action mapping.
<html:form action="Autenticacion" >

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in the last post, i mean to say remove both name and type as shown.

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