WebService bug

I am trying to execute the following code:

var wsdlURI = " http://queue.amazonaws.com/doc/2006-04-01/QueueService.wsdl";
sqsService = new WebService(wsdlURI);

// If the WSDL fails to load the onFault event is fired.
sqsService.onFault = function(fault){
trace("Impossible to load sqs webservice: " + fault.faultstring);
}

sqsService.onLoad = function(wsdl){
trace("loaded wsdl:" +wsdl);
}


And get the following trace:

WebServices Loaded successfully.
Sending error message: /opt/macromedia/fms/scriptlib/webservices/XMLSchema.asc: line 81: ReferenceError: document is not defined
Failed to execute method (XML.onData).

I don't know if this is due to a malformed WSDL or if it's an FMS bug.

Any ideas?

Thanks,

Mark