Guests can't vote!

Hello,
when I try to vote when logged in it works, but when I try it when im logged out it doesn’t work, I disabled varnish cache on my server then it worked, I’ve searched for the problem and the only thing I noticed is when I open source code when I’m logged in, I see this:

/* <![CDATA[ */
var spr_ajax_object = {"ajax_url":"http:\/\/haltaalam.info\/article\/wp-admin\/admin-ajax.php","scale":"5","spr_type":"rs","rating_working":"1","post_id":"6422"};
/* ]]> */

and when logged out:

/* <![CDATA[ */
var spr_ajax_object = {"ajax_url":"http:\/\/haltaalam.info\/article\/wp-admin\/admin-ajax.php","scale":"5","spr_type":"rs","rating_working":""};
/* ]]> */

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