XML syntax error in Windows

Hi guys,

When I parse a RSS feed in Linux, everything goes OK, but when I try to do 
it in Windows, I only receive the "Syntax error in line 1".
Line 1 is just the '<?xml version="1.0" encoding="ISO-8859-1"?>' line. And 
as I said, it only happens in windows. Can anyone explain to me why? I am 
just going nuts trying to find a reason for that error.

Thanks. Jose.