Alright,I am using seo ultimate plugin,and I got to know its link mask generator a few days ago,I'm so glad because it's easy to use.BUt today I found some problems,it won't redirect correctly.For instance,when I visit http://localhost/blog/go/google/,it won't go to google.com,just a 404 error page.I checked its code and I'm sure it's here Code: foreach ($aliases as $alias) if($to = $alias['to']) if (suurl::equal(suurl::current(), get_bloginfo('url') . "/$alias_dir/$to/")) wp_redirect($alias['from']); And I changed it slightly to debug it Code: foreach ($aliases as $alias) { $to = $alias['to']; $fir=suurl::current(); $sec=get_bloginfo('url')."/$alias_dir/$to/"; update_option("first",$fir); update_option("second",$sec); if(suurl::equal($fir,$sec)) wp_redirect($alias['from']); } In database,the wp_option table exactly,I saw the first is http://localhost/blog/?p=34 and the second is http://localhost/blog/go/google/,that's obviously why it won't work,but I still don't know how to fix it.Please help me,thanks