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

<definitions id="Definition"

targetNamespace="http://www.jboss.org/drools"

typeLanguage="http://www.java.com/javaTypes"

expressionLanguage="http://www.mvel.org/2.0"

xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.omg.org/spec/BPMN/20100524/MODEL BPMN20.xsd"

xmlns:g="http://www.jboss.org/drools/flow/gpd"

xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI"

xmlns:dc="http://www.omg.org/spec/DD/20100524/DC"

xmlns:di="http://www.omg.org/spec/DD/20100524/DI"

xmlns:tns="http://www.jboss.org/drools">

<process processType="Private" isExecutable="true" id="com.sample.bpmn" name="Sample Process" tns:packageName="defaultPackage" >

<!-- nodes -->

<startEvent id="_1" name="StartProcess" />

<scriptTask id="_2" name="test" scriptFormat="http://www.java.com/java" >

<script>System.out.println("Hello");</script>

</scriptTask>

<endEvent id="_3" name="End" >

<terminateEventDefinition/>

</endEvent>

<!-- connections -->

<sequenceFlow id="_1-_2" sourceRef="_1" targetRef="_2" />

<sequenceFlow id="_2-_3" sourceRef="_2" targetRef="_3" />

</process>

<bpmndi:BPMNDiagram>

<bpmndi:BPMNPlane bpmnElement="com.sample.bpmn" >

<bpmndi:BPMNShape bpmnElement="_1" >

<dc:Bounds x="45" y="45" width="48" height="48" />

</bpmndi:BPMNShape>

<bpmndi:BPMNShape bpmnElement="_2" >

<dc:Bounds x="163" y="52" width="80" height="48" />

</bpmndi:BPMNShape>

<bpmndi:BPMNShape bpmnElement="_3" >

<dc:Bounds x="333" y="51" width="48" height="48" />

</bpmndi:BPMNShape>

<bpmndi:BPMNEdge bpmnElement="_1-_2" >

<di:waypoint x="69" y="69" />

<di:waypoint x="203" y="76" />

</bpmndi:BPMNEdge>

<bpmndi:BPMNEdge bpmnElement="_2-_3" >

<di:waypoint x="203" y="76" />

<di:waypoint x="357" y="75" />

</bpmndi:BPMNEdge>

</bpmndi:BPMNPlane>

</bpmndi:BPMNDiagram>

</definitions>

Thank you.It worked in Designer 2.1 .I was using designer2.0.

thanks for the help.