What is a failed message in biztalk 2006

I created a simple schema with the name Employee.xsd in a project names TestSendPortDelivRec

<ns0:Employee xmlns:ns0=”http://TestSendPortDelivRec.Employee“>
  <FNAME>Srinivas</FNAME>
  <LNAME>Kandha</LNAME>
  <PLACE>HP EC1</PLACE>
</ns0:Employee>

I also created a simple orchestration, which gets a file from a receive file location and move the same message to a different file location.

I tried using “Enable routing for failed messages” on file receive port. But when the recieve port expects a different message type other than what it is configured to, it fails.  It always expects to receive a message type which is already deployed, if not it fails. When you copy a file of different message type which is already deployed to this location it treats as error message and does its job. And if there is any error in the expected message type (say “<” or ” is missing) also it fails. I just want to know what exactly is a failed message or fault message in biztalk.

Say for example, instead of sending the above message type, if I copy the .xml file with the following data (where the root node is changed to Employeess)

<ns0:Employeess xmlns:ns0=”http://TestSendPortDelivRec.Employee“>
  <FNAME>Srinivas</FNAME>
  <LNAME>Kandha</LNAME>
  <PLACE>HP EC1</PLACE>
</ns0:Employeess>

it fails by writing the following errors to the event log given below

Event Type: Error
Event Source: BizTalk Server 2006
Event Category: BizTalk Server 2006
Event ID: 5719
Date:  8/14/2008
Time:  12:08:35 AM
User:  N/A
Computer: VAASU
Description:
There was a failure executing the receive pipeline: “Microsoft.BizTalk.DefaultPipelines.XMLReceive, Microsoft.BizTalk.DefaultPipelines, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35” Source: “XML disassembler” Receive Port: “TestSendPortDelivRec_1.0.0.0_TestSendPortDelivRec.Test_Port_1_dcd0a51ed911e477” URI: “C:\VASUData\Testand Delete\TestSendPortDelivRec\IN\*.xml” Reason: Finding the document specification by message type “http://TestSendPortDelivRec.Employee#Employeess” failed. Verify the schema deployed properly.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

AND

Event Type: Error
Event Source: BizTalk Server 2006
Event Category: BizTalk Server 2006
Event ID: 5720
Date:  8/14/2008
Time:  12:08:35 AM
User:  N/A
Computer: VAASU
Description:
There was a failure executing the send pipeline: “Microsoft.BizTalk.DefaultPipelines.XMLTransmit, Microsoft.BizTalk.DefaultPipelines, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35” Source: “XML assembler” Send Port: “SendPort1” URI: “C:\VASUData\Testand Delete\TestSendPortDelivRec\Failed\%MessageID%.xml” Reason: This Assembler cannot retrieve a document specification using this type: “http://TestSendPortDelivRec.Employee#Employeess“.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

AND

Event Type: Error
Event Source: BizTalk Server 2006
Event Category: BizTalk Server 2006
Event ID: 5754
Date:  8/14/2008
Time:  12:08:35 AM
User:  N/A
Computer: VAASU
Description:
A message sent to adapter “FILE” on send port “SendPort1” with URI “C:\VASUData\Testand Delete\TestSendPortDelivRec\Failed\%MessageID%.xml” is suspended.
 Error details: There was a failure executing the send pipeline: “Microsoft.BizTalk.DefaultPipelines.XMLTransmit, Microsoft.BizTalk.DefaultPipelines, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35” Source: “XML assembler” Send Port: “SendPort1” URI: “C:\VASUData\Testand Delete\TestSendPortDelivRec\Failed\%MessageID%.xml” Reason: This Assembler cannot retrieve a document specification using this type: “http://TestSendPortDelivRec.Employee#Employeess“.  
 MessageId:  {EC2CAA90-8C28-4007-A430-0924EE4703B0}
 InstanceID: {146284E2-C1C8-455A-A098-7B001AF2EACC}

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

 Please let me know if you have any idea about this. I thank you in advance.

Vaasu