Send Receipt Ack Failed.

I got as follow Error Stack Trace on Send Receipt Ack Step. Because the ReceiptAcknowledgement/fromRole/PartnerRoleDescription/ContactInformation/contactName contain “&”; word. It seems not encode to html. Becasue I found sender site had encode to html. I found the received document wiht &.

com.wm.lang.flow.FlowException: ip.cm.handlers:sendReceiptAck(): Error trapped in service: wm.ip.rnif11.trp:createReceiptAck Error: com.wm.lang.flow.WattEvaluationException: com.wm.lang.xml.WMDocumentException: [ISC.0042.9325] Element is missing end tag Occured at: 2004/03/08 14:15:08.937 Service Call Stack: wm.ip.rnif11.trp:createReceiptAck wm.ip.rnif11.trp:sendReceiptAck wm.ip.cm.handlers:sendReceiptAck at com.wm.lang.flow.FlowExit.getFailure(FlowExit.java:250) at com.wm.lang.flow.FlowState.willExit(FlowState.java:265) at com.wm.lang.flow.FlowSequence.invoke(FlowSequence.java(Compiled Code)) at com.wm.lang.flow.FlowRoot.invoke(FlowRoot.java:258) at com.wm.lang.flow.FlowState.invokeNode(FlowState.java(Compiled Code)) at com.wm.lang.flow.FlowState.invoke(FlowState.java(Compiled Code)) at com.wm.lang.flow.FlowState.invoke(FlowState.java(Compiled Code)) at com.wm.app.b2b.server.FlowSvcImpl.baseInvoke(FlowSvcImpl.java:1740) at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:344) at com.wm.app.b2b.server.BaseService.invoke(BaseService.java:153) at com.wm.lang.flow.FlowInvoke.invoke(FlowInvoke.java:324) at com.wm.lang.flow.FlowState.invokeNode(FlowState.java(Compiled Code)) at com.wm.lang.flow.FlowState.invoke(FlowState.java(Compiled Code)) at com.wm.lang.flow.FlowState.invoke(FlowState.java(Compiled Code)) at com.wm.app.b2b.server.FlowSvcImpl.baseInvoke(FlowSvcImpl.java:1740) at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:344) at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:104) at com.wm.app.b2b.server.Service.doInvoke(Service.java:605) at com.wm.app.b2b.server.Service.doInvoke(Service.java:554) at com.wm.app.prt.IntegrationServer.invoke(IntegrationServer.java:55) at com.wm.app.prt.IntegrationServer.invokeWrapper(IntegrationServer.java:41) at com.wm.app.prt.StepDispatcherAgent.runStep(StepDispatcherAgent.java:479) at com.wm.app.prt.StepDispatcherAg

I encouter the same question for 3a4 process. Pls Help!!!