รบกวนช่วยแก้ปัญหา Mod_Rewrite ไม่รองรับภาษาไทย หน่อยครับ

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
        <rewrite>
            <rules>
                <remove name="Imported Rule 1" />
                <rule name="Imported Rule 2">
                    <match url="^(.*)\/([0-9]+)$" ignoreCase="false" />
                    <action type="Rewrite" url="{R:1}/content.php?ref={R:2}" appendQueryString="false" />
                </rule>							
            </rules>
        </rewrite>
		
		<httpErrors>  
        	<remove statusCode="403" subStatusCode="-1" />                
        	<error statusCode="403" path="/index.php" responseMode="ExecuteURL" />
			<remove statusCode="404" subStatusCode="-1" />                
        	<error statusCode="404" path="/index.php" responseMode="ExecuteURL" />                
      	</httpErrors>
	  
    </system.webServer>
    <system.net>
        <mailSettings>
            <smtp deliveryMethod="Network" from="">
                <network host="localhost" port="25" />
                <specifiedPickupDirectory pickupDirectoryLocation="A:\Host\website.com\Queue" />
            </smtp>
        </mailSettings>
    </system.net>
</configuration>