java.io.FileNotFoundException: http://www.jaspersoft.com/schema/highcharts.xsd

I downloaded jasper 30 days trial to try and then buy it.

Then I just tried to compile a report which has a HTML5 Pie Chart that has following lines:

xmlns:hc="http://jaspersoft.com/highcharts"
xsi:schemalocation="http://jaspersoft.com/highcharts http://jaspersoft.com/schema/highcharts.xsd">

I tried to browse "http://jaspersoft.com/schema/highcharts.xsd" via FireFox and I found it really does not exist.

The stack trace is:

java.io.FileNotFoundException: http://www.jaspersoft.com/schema/highcharts.xsd sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1623)
com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:633)
com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(XMLVersionDetector.java:189)
com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaParsingConfig.parse(SchemaParsingConfig.java:582)
com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaParsingConfig.parse(SchemaParsingConfig.java:685)
com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaDOMParser.parse(SchemaDOMParser.java:530)
com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.getSchemaDocument(XSDHandler.java:2155)
com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.parseSchema(XSDHandler.java:562)
com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.loadSchema(XMLSchemaLoader.java:588)
com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.findSchemaGrammar(XMLSchemaValidator.java:2448)
com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:1767)
com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:741)
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:376)
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2717)
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:607)
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:116)
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:489)
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:835)
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:123)
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1210)
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:568)
org.apache.commons.digester.Digester.parse(Digester.java:1892)
net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:243)
net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:230)
net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:218)
net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:172)
net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:156)
net.sf.jasperreports.engine.JasperCompileManager.compileToFile(JasperCompileManager.java:137)
net.sf.jasperreports.engine.JasperCompileManager.compileReportToFile(JasperCompileManager.java:438)

What's the matter please?

EDIT+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

RESOLVED: By adding highcharts-5.2.0.jar to the project built path!

RESOLVED!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!