xml validator can't find xsd even though it's specified in xml file

<?xml version="1.0" encoding="UTF-8"?>
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<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"
    xmlns:cm="http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.0.0"
    xmlns:enc="http://karaf.apache.org/xmlns/jasypt/v1.0.0" xmlns:jaas="http://karaf.apache.org/xmlns/jaas/v1.0.0">