Servlet Action is not available

[hitendra chopra]

i have added following code in validation.xml.
<form name="AddressForm">
<field property="name"
depends="required">
<arg key="AddressForm.name"/>
</field>
<field property="address"
depends="required">
<arg key="AddressForm.address"/>
</field>
<field property="emailAddress"
depends="required">
<arg key="AddressForm.emailAddress"/>
</field>
</form>

After adding this code i am getting error like 'servlet action is not available'.Can you guess that what is the problem with above code or what is missing to configure that its gives error only after making changes in validation.xml?