[PHP] Bad char Translation

[-oOo HONU oOo-]

Hi,

I've got a text file containing "blés, Châteaux ..."  (without quotes)

I'm reading this file like this

$FileName = "Test.txt";
$FileHand = fopen($FileName, "rb");
$Data = fread($FileHand, filesize($FileName));
fclose($FileHand);
print_r($Data);

Under Linux, by asking the script throught an HTTP server ... i've got the good text
blés, Châteaux ...

But when i launch the script through the console (under windows 2000) ... characters 
are translated :
blùs, Chôteaux ...

what does it means .. .?

Thanks for your help ...