JasperReports: generation error from java with external fonts - jasper-reports

Question

My program generates an error for arabic letter :
cannot assign instance of net.sf.jasperreports.engine.base.JRBaseStaticText to field
net.sf.jasperreports.engine.base.JRBaseParagraph.paragraphContainer of type
net.sf.jasperreports.engine.JRParagraphContainer in instance of
net.sf.jasperreports.engine.base.JRBaseParagraph
I am using:
iReport 4.0.2
Windows XP
jasperreports-fonts-4.0.2.jar
jasperreports 4.0.2.jar
jasperreports-extensions-3.5.3
My .jrxml file is:
<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="report1" language="groovy" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
<parameter name="strTitle" class="java.lang.String"/>
<field name="vchDhirams" class="java.lang.String"/>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="21" splitType="Stretch">
<staticText>
<reportElement x="221" y="1" width="100" height="20"/>
<textElement markup="none"/>
<text><![CDATA[$P{strTitle}]]></text>
</staticText>
</band>
</title>
<pageHeader>
<band height="35" splitType="Stretch"/>
</pageHeader>
<columnHeader>
<band height="37" splitType="Stretch">
<staticText>
<reportElement x="294" y="17" width="135" height="20"/>
<textElement>
<font pdfEncoding="Identity-H" isPdfEmbedded="true"/>
</textElement>
<text><![CDATA[ستلام قسيمة]]></text>
</staticText>
</band>
</columnHeader>
<detail>
<band height="125" splitType="Stretch"/>
</detail>
<columnFooter>
<band height="45" splitType="Stretch"/>
</columnFooter>
<pageFooter>
<band height="54" splitType="Stretch"/>
</pageFooter>
<summary>
<band height="42" splitType="Stretch"/>
</summary>
</jasperReport>
Where is my fault? Please suggest me.
Thanks in advance.