400 bad request doing everithing wright

I made a code and it returns me error 400 bad request but I printed the url and used in my explorer and it works so its a www(…) problem i dont understand is completely illogic.
Here is the post_url:

localhost/fishPHPscripts/localaddscore.php?uniqueID=fb 115769435607315&name=James&score=15&hash=98562f5c7cff89eafa4b87501ca9700a

IEnumerator IPostScores ()
		//This connects to a server side php script that will add the name and score to a MySQL DB.
		// Supply it with a string representing the players name and the players score.
		string hash = Md5Sum (name3 + actual_score + secretKey);

		//string post_url = addScoreURL + "name=" + WWW.EscapeURL(name) + "&score=" + score + "&hash=" + hash;
		string post_url = addScoreURL + "uniqueID=" + uniqueID + "&name=" + WWW.EscapeURL (name3) + "&score=" + actual_score + "&hash=" + hash;
		print (post_url);
		// Post the URL to the site and create a download object to get the result.
		WWW hs_post = new WWW ("http://"+post_url);
		yield return hs_post; // Wait until the download is done

		if (hs_post.error != null) {
			print ("There was an error posting the high score: " + hs_post.error);

after thinking, i change my score int into a string and ad www.escape to each variable, it solved my problem:

		string post_url =addScoreURL+"uniqueID="+WWW.EscapeURL(uniqueID)+"&name="+WWW.EscapeURL(name3)+"&score="+WWW.EscapeURL(actual_score.ToString())+"&hash="+WWW.EscapeURL(hash);