urlencode by gb2312 don't working

http://localhost/%d6%d3%ce%de%d1%de/%a1%be%c0%b6%b9%e2%f7%c8%d3%b0www.bluemov.com%a1%bf%d6%d3%ce%de%d1%de.2010.%d6%d0%b9%fa%cc%a8%cd%e5.%b5%da01%bc%af.DVD-HALFCD2.mp4

urlencodr by utf-8 working

http://localhost/%E9%92%9F%E6%97%A0%E8%89%B3/%E3%80%90%E8%93%9D%E5%85%89%E9%AD%85%E5%BD%B1www.bluemov.com%E3%80%91%E9%92%9F%E6%97%A0%E8%89%B3.2010.%E4%B8%AD%E5%9B%BD%E5%8F%B0%E6%B9%BE.%E7%AC%AC01%E9%9B%86.DVD-HALFCD2.mp4

please help me for gb2312 support.