Fix your XML in this way:
<alugueis xmlns="simulado"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="simulado imoveis.xsd"
mes="outubro" ano="2012">
And your XSD should then be able to be found. You will have further fixes to make (eg condominio
), but those should be self-explanatory. If not, feel free to post again.