Not Found!!!!! top menu doesnt work !!!

[parishun]

hello
excuse me , I cant type farsi !!
my top menu doesnt work : when I click on Items , this message appear :
Not Found

The requested URL /component/option,com_contact/task,view/contact_id,1/Itemid,30/ was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Apache/2.2.6 (Unix) mod_ssl/2.2.6 OpenSSL/0.9.7a mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 mod_jk/1.2.25 PHP/5.2.5 Server at saar.ir Port 80

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what is this ? what is problem ? thanx