Validate Fixml Against Schema (Xsd)

I'm trying to validate some FIXML messages that I received from a business partner but I couldn't. I think should be a namespace problem because the parser don't identify the root tag (FIXML). Any thoughts?

Thanks a lot for any help.

Java Schema Validator

static boolean validateAgainstXSD(InputStream xml, InputStream xsd) {
        try {
            SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
            Schema schema = factory.newSchema(new StreamSource(xsd));
            Validator validator = schema.newValidator();
            validator.validate(new StreamSource(xml));
            return true;

        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

FIXML to be validated

<?xml version="1.0" encoding="utf-8"?>
<FIXML v="FIX.5.0SP2" xmlns:xs="">
    <TrdCaptRpt TrdID="32KGWND0000000099@20220411" ExecID="ExecID" TrdDt="2022-04-11" BizDt="2022-04-11" LastUpdateTm="2022-04-11T09:27:23.404Z" LastQty="1" LastPx="101.1" MktSegID="XEUR" LastMkt="XEUR" VenuTyp="E" TrdTyp="0" AsOfInd="0" TransTyp="0" MtchID="1" TrnsfrRsn="004" MLegRptTyp="1" Clrd="0">
        <Hdr SeqNum="2587905699377885" SID="CM1_EU" TID="CM1_EU" Snt="2022-04-11T14:14:59.407564Z" SSub="FIS CD"/>
        <RegTrdID Evnt="2" Typ="0" ID="E01XEURECAGWC00000000000099KGWND0000000002"/>
        <Instrmt Exch="XEUR" Sym="DBK9" CFI="OCXXXN" MatDt="2023-03-31" MMY="202303" PutCall="1" StrkPx="100.0"/>
        <RptSide Side="1" TrdID="32KGWND0000000099" PosEfct="O" CustOrdHdlInst="D">
            <Pty ID="CM1_EU" R="1"/>
            <Pty ID="CLIENT1UK_ACC1_DEFACCREF" R="24"/>
            <Pty ID="A1" R="38"/>
            <Pty ID="CM1_EU" R="4"/>
            <Pty ID="ECAG" R="21"/>
            <Pty ID="TRADER" R="12"/>
            <TrdRegTS TS="2022-04-11T08:18:03.689Z" Typ="1"/>
            <TrdRegTS TS="2022-04-11T14:14:59.391Z" Typ="13"/>
            <TrdRegTS TS="2022-04-11T08:18:03.689Z" Typ="19"/>
            <TrdRptOrdDetl OrdID="ORDERID"/>
        </RptSide>
    </TrdCaptRpt>
</FIXML>

XML Schema to validate

<?xml version="1.0" encoding="utf-8"?>

<!-- FIXML Schema Version FIX.5.0SP2 EP240 Generated: 2017-12-29T02:42:44.519Z 
    Copyright(c) FIX Protocol Limited. All rights reserved. Comments and errors 
    should be posted on the FIX protocol web-site  -->

<xs:schema xmlns:xs=""
           xmlns=""
           xmlns:fm=""
           xmlns:xsi=""
           xsi:schemaLocation=" fixml-metadata-5-0-SP2.xsd"
           targetNamespace=""
           elementFormDefault="qualified"
           attributeFormDefault="unqualified">
   <xs:include schemaLocation="fixml-tradecapture-base-5-0-SP2.xsd"/>
</xs:schema>

PS: All included schemas are available in the same folder where the referenced is, as you can see below.

Schemas