STRUTS2.0 Validation Errors

    <!DOCTYPE validators PUBLIC 

    "-//OpenSymphony Group//XWork Validator 1.0.2//EN" 

    "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">



    <validators>

<field name="username">

    <field-validator type="requiredstring">

        <param name="trim">true</param>

        <message>Login name is required</message>

    </field-validator>

</field>

<field name="password">

    <field-validator type="requiredstring">

        <param name="trim">true</param>

        <message>Password is required</message>

    </field-validator>

</field>

    </validators>

am using the above given LoginAction-validation.xml fro Login Action class.and the Login form is using the default theme.Validation is happening perfectly.

But the problem is even if i am enering the values the previous field errors persist in the page.

For eg:if i am not entering both username n password it ll show me 2 error messages saying "username is required" and "password is required".Next time even if i am enering the username the first message("username is required") is not getting removed.It still shows both the messages.Can you help me pls!