Biztalk 2006 XML to HL7 Problem

I have a Biztalk application (with HL7 accelerator 1.3) configured to transform an XML file into hl7 format and send along using the MLLP port but I run into the following error:

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A message sent to adapter “MLLP” on send port “MLLPOutput” with URI “127.0.0.1:10000” is suspended.

Error details: There was a failure executing the send pipeline: “BTAHL72XPipelines.BTAHL72XSendPipeline, BTAHL72XPipelines, Version=1.3.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35” Source: “BTAHL7 2.X Assembler” Send Port: “MLLPOutput” URI: “127.0.0.1:10000” Reason: Serialization errors:

Error # 1

Segment Id: MSH

Sequence Number: 1

Field Number: 9

Error Number: 207

Error Description: Application internal error

Encoding System: HL7nnnn

Alternate Error Number: Z100

Alternate Error Description: The data for the parent entity cannot end with child tag <MSH.9_MessageType>

Alternate Encoding System: HL7-BTA

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I have a Windows Service monitoring a practice database system and outputting the XML for the appropriate event. Note: Not all HL7 fields are present because this is a “homegrown” database application and simply doesn’t account for many HL7 fields. The XML output looks like this (names changed to protect the innocent):

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<?xml version=”1.0″ encoding=”utf-8″ standalone=”yes”?>
<HL7_MESSAGE_ADT_A08>
    <MSH>
        <MSH.1>
            <Field_Separator>|</Field_Separator>
        </MSH.1>
        <MSH.2>
            <Encoding_Characters>^~\&amp;</Encoding_Characters>
        </MSH.2>
        <MSH.3>
            <Sending_Application>XYZ Database</Sending_Application>
        </MSH.3>
        <MSH.4>
            <Sending_Facility>ABC Physicians Group</Sending_Facility>
        </MSH.4>
        <MSH.6>
            <Receiving_Facility>JKLMNOP</Receiving_Facility>
        </MSH.6>
        <MSH.7>
            <DateTime_of_Message>20090112141346</DateTime_of_Message>
        </MSH.7>
        <MSH.9>
            <MESSAGE_CODE>ADT</MESSAGE_CODE>
         </MSH.9>
         <MSH.9.1>
            <TRIGGER_EVENT>A08</TRIGGER_EVENT>
         </MSH.9.1>
         <MSH.9.2>
            <MESSAGE_STRUCTURE>ADT_A01</MESSAGE_STRUCTURE>
         </MSH.9.2>
    </MSH>
    <PID>
        <PID.1>
            <Set_ID_-_PID>1</Set_ID_-_PID>
        </PID.1>
        <PID.2>
            <Patient_ID>P12345</Patient_ID>
        </PID.2>
        <PID.5>
            <PID.5.1>
                <FIRST_NAME>BETTY</FIRST_NAME>
            </PID.5.1>
            <PID.5.2>
                <LAST_NAME>TESTER</LAST_NAME>
            </PID.5.2>
            <PID.5.3>
                <MIDDLE_NAME />
            </PID.5.3>
            <PID.5.4>
                <SUFFIX_NAME />
            </PID.5.4>
        </PID.5>
        <PID.7>
            <DateTime_of_Birth>3/10/1968</DateTime_of_Birth>
        </PID.7>
        <PID.8>
            <Sex>F</Sex>
        </PID.8>
        <PID.11>
            <PID.11.1>
                <STREET_ADDRESS1>123 Main Street</STREET_ADDRESS1>
            </PID.11.1>
            <PID.11.2>
                <STREET_ADDRESS2>””</STREET_ADDRESS2>
            </PID.11.2>
            <PID.11.3>
                <CITY>ALBANY</CITY>
            </PID.11.3>
            <PID.11.4>
                <STATE>NY</STATE>
            </PID.11.4>
            <PID.11.5>
                <ZIP_CODE>12345</ZIP_CODE>
            </PID.11.5>
        </PID.11>
        <PID.13>
            <Phone_Number_-_Home>(518)555-1212</Phone_Number_-_Home>
        </PID.13>
        <PID.18>
            <Patient_Account_Number>P12345</Patient_Account_Number>
        </PID.18>
        <PID.19>
            <SSN_Number_-_Patient />
        </PID.19>
        <PID.14>
            <Phone_Number_-_Business>””</Phone_Number_-_Business>
        </PID.14>
        <PID.16>
            <Marital_Status />
        </PID.16>
        <PID.29>
            <Patient_Death_Date_and_Time>11/20/2008</Patient_Death_Date_and_Time>
        </PID.29>
        <PID.30>
            <Patient_Death_Indicator>Y</Patient_Death_Indicator>
        </PID.30>
    </PID>
    <PV1>
        <PV1.1>
            <Set_ID_-_PV1>1</Set_ID_-_PV1>
        </PV1.1>
        <PV1.2>
            <Patient_Class>OUTPATIENT</Patient_Class>
        </PV1.2>
        <PV1.3>
            <Assigned_Patient_Location>Associates in Cardiology</Assigned_Patient_Location>
        </PV1.3>
        <PV1.4>
            <Admission_Type>ABCD</Admission_Type>
        </PV1.4>
        <PV1.7>
            <Attending_Doctor>Dr.John Doe</Attending_Doctor>
        </PV1.7>
        <PV1.8>
            <PV1.8.1>
                <FIRST_NAME />
            </PV1.8.1>
            <PV1.8.2>
                <LAST_NAME />
            </PV1.8.2>
        </PV1.8>
        <PV1.9>
            <Consulting_Doctor />
        </PV1.9>
        <PV1.17>
            <Admitting_Doctor />
        </PV1.17>
        <PV1.19>
            <Visit_Number>34567</Visit_Number>
        </PV1.19>
        <PV1.44>
            <PV1.44.1>
                <ADMIT_DATE>10/30/2008</ADMIT_DATE>
            </PV1.44.1>
            <PV1.44.2>
                <ADMIT_TIME />
            </PV1.44.2>
        </PV1.44>
        <PV1.45>
            <Discharge_DateTime />
        </PV1.45>
    </PV1>
</HL7_MESSAGE_ADT_A08>

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So this XML gets mapped in an orchestration to an HL7 2.3.1 multipart message containing BTAHL7Schemas.MSH_24_GLO_DEF and BTAHL7Schemas.ADT_A08_231_GLO_DEF parts. Fairly simple and straightforward. Can anyone give me a push in the right direction? Thank You!