Java field imported to ABAP RFC

Question

Hello,
I'm using the following code in a User Defined Function within XI 3.0 and I'm having difficulty getting the correct "message id" imported into the RFC. 
I've tried changing the data type of I_MESSAGEID.  Using this message id and the following data types I get different results: 
I_MESSAGEID should look like this:  4989D6DBCE5B4C85E10000000A5060AC
but when...
I_MESSAGEID is set to CHAR(32):  Ó倃၏טℶ፝㓓
I_MESSAGEID is set to RAW(16):  E3DF01DB7D03DB6E3ADF9E84135D34D3
I_MESSAGEID is set to String:  ######n:ߞ##]4#
Here is my java code:
public String Create_ZTOR_Rec(String MsgID,String MsgDate,String MsgTime,String PONum,Container container){
String content = "";
MappingTrace importanttrace;
importanttrace = container.getTrace();
// filling the string with our RFC-XML (with values)
String m = "<?xml version="1.0" encoding="UTF-8"?><ns0:Z_UDF_CREATE_ZTOR_REC xmlns:ns0="urn:sap-com:document:sap:rfc:functions">";
m = m + "<I_MESSAGEID>" + MsgID + "</I_MESSAGEID>";
m = m + "<I_EBELN>" + PONum + "</I_EBELN>";
m = m + "<I_ERDAT>" + MsgDate + "</I_ERDAT>";
m = m + "<I_UZEIT>" + MsgTime + "</I_UZEIT>";
m = m + "</ns0:Z_UDF_CREATE_ZTOR_REC>";
RfcAccessor accessor = null;
ByteArrayOutputStream out = null;
try
// 1. Determine a channel (Business system, Communication channel)
Channel channel = LookupService.getChannel("XI","GeneratedReceiverChannel_RFC");
// 2. Get a RFC accessor for a channel.
accessor = LookupService.getRfcAccessor(channel);
Any Ideas how I can convert this message id in Java to import it properly?
Thanks,
Matt

Answer 1

It is a good document and I noticed the link to Help.sap.com explained why writing to/updating a table through java mapping is not a good idea but in this case I do not have an option.
I was unable to find anything to explain why all the other strings are processed in the RFC but the message id gets garbled.
When I test the RFC manually it works properly.  When I attach the message id to the outgoing document it appears correctly.  So the error appears to be happening here:
// 3. Create a xml input stream representing the function module request message.
InputStream inputStream = new ByteArrayInputStream(m.getBytes());
// 4. Create xml payload
XmlPayload payload = LookupService.getXmlPayload(inputStream);
// 5. Execute Record Create.
Payload result = accessor.call(payload);
InputStream in = result.getContent();
Does anyone know how I can get the correct message id into my RFC?
Thanks,
Matt