[admamy]

Thanks Philj, I have tried it, seems it is not working with version 4.2. And, I noticed that, there do not have "<input type="text" id="uname" name="uname" size="32" maxlength="32" value="{if $userinfo.uname}{$userinfo.uname}{else}{$userinfo. login}{/if}" />" appearing twice in skin1/main/register_account.tpl for anonymous and non-anonymous registrations.

Anyway thanks, hope will find the solution soon.