AxisFault exception problem

[GeofferyR Durham]

I am having a problem with using tomcat4.0 and AXIS. Below is the exception displayed at runtime in the command line. The exception is thrown after this line is executed:
Object resp = call.invoke("", "getMenuSchema", new Object[] {});
'call' is an instance of 'org.apache.axis.client.ServiceClient'

Would anybody be able to tell me what the invoke method shown above does? Does anybody know how to solve the error? Any help would be much appreciated. Thanks.
Exception in thread "main" AxisFault
faultCode: null
faultString: Method not found
Method name=getMenuSchema
Service name=JWSProcessor
faultActor: null
faultDetails: null
at org.apache.axis.message.SOAPFaultElement.getAxisFault(SOAPFaultElement.java:132)
at org.apache.axis.message.SOAPFaultBuilder.<init>(SOAPFaultBuilder.java:90)
at org.apache.axis.message.BodyBuilder.onStartChild(BodyBuilder.java:77)
at org.apache.axis.encoding.DeserializationContext.startElement(DeserializationContext.java:528)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:445)
at org.apache.xerces.impl.XMLNamespaceBinder.handleStartElement(XMLNamespaceBinder.java:832)
at org.apache.xerces.impl.XMLNamespaceBinder.startElement(XMLNamespaceBinder.java:568)
at org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:808)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:752)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1454)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:333)
at org.apache.xerces.parsers.StandardParserConfiguration.parse(StandardParserConfiguration.java:525)
at org.apache.xerces.parsers.StandardParserConfiguration.parse(StandardParserConfiguration.java:581)
at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:147)
at org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1157)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:345)
at org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:160)
at org.apache.axis.Message.getAsSOAPEnvelope(Message.java:319)
at org.apache.axis.client.ServiceClient.invoke(ServiceClient.java:588)
at org.apache.axis.client.ServiceClient.invoke(ServiceClient.java:494)
at ThaiPalaceMenuServiceSoapBindingStub.getMenuSchema(ThaiPalaceMenuServiceSoapBindingStub.java:131)
at ThaiPalaceMenuClient.main(ThaiPalaceMenuClient.java:17)