JUnit.org Resources for Test Driven Development

I am new to JUnit, While trying to execute the JUnit using ANT script, I am getting the java.lang.ClassNotFoundException: Exception.

For your reference, I have added the build.xml below. Please correct me, where i went wrong

target name="test-report"
junit showoutput="yes" printsummary="true" fork="no"
classpath refid="classpath"/
formatter type="brief" usefile="false"/
test name="com.cybersource.junit.TestSybaseProcedure"/
/junit
junitreport todir="${unittest.reports}"
fileset dir="${unittest.reports}"
include name="TEST-*.xml"/
/fileset
report format="noframes" styledir="etc/xsl" todir="${unittest.reports}"/
/junitreport
/target

--Balaji S