SOAPFormatter not deserializing SOAP message

[craig]

Hi,

I'm new to all this and having tremendous difficulty trying to
deserialize
the following:

<soap-env:Envelope
xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/"><soap-env:Header><TransactionID
xmlns="http://www.3gpp.org/ftp/Specs/archive/23_series/23.140/schema/REL-5-MM7-1-0"
soap-env:mustUnderstand="1">-1433961100312413552</TransactionID></soap-env:Header><soap-env:Body><SubmitReq
xmlns="http://www.3gpp.org/ftp/Specs/archive/23_series/23.140/schema/REL-5-MM7-1-0"><MM7Version>5.3.0</MM7Version><SenderIdentification><VASPID>AIRBORN</VASPID><VASID>ABTEST_100</VASID><SenderAddress>27839300004</SenderAddress></SenderIdentification><Recipients><To><Number
displayOnly="false">27832229614</Number></To></Recipients><MessageClass>Informational</MessageClass><TimeStamp>2005-05-25T11:01:31+02:00</TimeStamp><DeliveryReport>false</DeliveryReport><Priority>Normal</Priority><Subject>Craigs
SOAP Sample MMS message</Subject><Content
href="Cid:SOAPContentID"/></SubmitReq></soap-env:Body></soap-env:Envelope>

Could anyone with a clue as to what to do give me a step by step
explanation
as to how I go about doing this.
What I have done and that hasn't worked is copied the schema at
http://www.3gpp.org/ftp/Specs/archiv.../REL-5-MM7-1-0

and used xsd.exe to create class files. Once done, I tried using the
SOAPFormatter class to deserialize the contents of mm7soap.txt but the
following exception was thrown:

System.Runtime.Serialization.SerializationExceptio n: Parse Error, no
assembly associated with Xml key _P1 SubmitReq at
System.Runtime.Serialization.Formatters.Soap.SoapH andler.ProcessGetType(String
value, String xmlKey, String& assemblyString) at
System.Runtime.Serialization.Formatters.Soap.SoapH andler.ProcessType(ParseRecord
pr, ParseRecord objectPr) at
System.Runtime.Serialization.Formatters.Soap.SoapH andler.ProcessAttributes(ParseRecord
pr, ParseRecord objectPr)

I set the AssemblyFormat property to Simple thinking that would solve
my
problem, but the same exception is still being thrown.
Any help will be greatly appreciated.
Best regards,
Craig