On my page for edit user I have two fields like:

<s:textfield name="userShortName" label="Short Name" value="%{user.shortName}" /><br/>
<s:textfield name="userName" label="Name" value="%{user.name}" /><br/>

Page is generated properly, fields are filled, user changes something, new values are being validated and now is the problem: when validation fails page is regenerated, proper error appears, but those fields are empty. How can I fix this?