Persian Permalink Problem on windows 2003

Hi to All

I am trying to use wordpress 3.01 as a new service of our network on http://www.Dez.ir with persian language as default language.

My problem is with UniCode Persian Permalinks. if we use %postname% in our permalink wordpress can’t get the relevant page and return 404 page not found text. and if we manually change the post name an English phrase it work like a charm.

So please help me to get Persian Permalink to work. you can see some examples here:
Persian Permalink (don’t work) : http://sandbox.dez.ir/index.php/1389/07/سلام-جهان/

English Permalink (work) : http://sandbox.dez.ir/index.php/about/