Syntax error: expecting rightparen before colon

hi guys,

I am new in FLAX technology.i have just started to learn it.

now i have my simple pro. which converts ferenhit into celcius temparature.i have my temparature.mxml file in src folder and temparature.as file in include folder.i got error when i give path in script for actionscript.
below is my code for :
[SIZE=1]
<?xml version=“1.0”?> <!-- usingas/ASSourceFile.mxml -->
<mx:Application xmlns:mx=“http://www.adobe.com/2006/mxml”>
<!-- Specify the ActionScript file that contains the function. -->
<mx:Script source=“includes/temparature.as”/>
<mx:Panel title=“My Application” paddingTop=“10” paddingBottom=“10” paddingLeft=“10” paddingRight=“10”>
<mx:HBox>
<mx:Label text=“Temperature in Fahrenheit:”/>
<mx:TextInput id=“fahrenheit” width=“120”/>
<mx:Button label=“Convert” click=“celsius.text=calculate(fahrenheit.text);”/>
<mx:Label text=“Temperature in Celsius:”/>
<mx:Label id=“celsius” width=“120” fontSize=“24”/>
</mx:HBox>
</mx:Panel>
</mx:Application>

BELOW IS MY CODE FOR TEMPARATURE.AS:

[SIZE=1]public function calculate(s:String):String
{
var n:Number = Number(s);
var t:Number = Math.round((n-32)/1.8*10)/10;
return String(t);
}

[/SIZE][/SIZE][SIZE=1]I GOT ERROR AT <SCRIPT/> TAG IS:[/SIZE]
[SIZE=1] IT DOESN’T GET .AS FILE [/SIZE]