Looks like there's a problem in the Windows version of the mssql extension. I'm having the same problem as Leonid Freidin with queries that have a image in the result.
I'm using php4.04pl1.
This is the code.

<?
$con = mssql_connect("laptop2000","sa","adfasdf") or die("couldnt connect to db");  //Nos conectamos al servidor de BD
if (mssql_select_db("MexMatch",$con)) {
	$query= "select * from Usuario where apodo = 'karls'";  //It crashes here, because I have an image field here.
	$result = mssql_query($query,$con) or die("bke");
	while($array = mssql_fetch_array($result))
		echo $array{"apodo"};
	mssql_free_result($result);
	}
	
mssql_close($con);
?>