Biztalk 2A1 MSG picked up but not processed by BizTalk Application1(Rosettanet)

Client Sends 2A1/3B2/3A6 Messages to Our Gateway Server – Data gets picked by BizTalk Application 1(Rosettanet). However it is unable to process the message and insert into BTRAN Database. The event log on BizTalk server display the below error for 2A1 but similar errors occurs for 3B2/3A6 Also.

1#
Source module:
RNDisAssembler
Correlation information:
Description:
Receive pipeline rejected incoming message
due to the following RNIF exception:
UNP.SCON.VALERR : A failure occurred while validating the service content.

Details:
Finding the document specification by message type “http://schemas.microsoft.com/biztalk/btarn/2004/Pip2A1ProductCatalogInformationNotification.dtd#Pip2A1ProductCatalogInformationNotification” failed. Verify the schema deployed properly.

2#
PublicResponderProcess
Correlation information:
PIP Code : 2A1
PIP Version : V02.00
PIP InstanceID:xxxxxxx
SourcePartnerName : xxxxx
DestinationPartnerName : xxxxxx

Description:
Root element is missing.

3#
xlang/s engine event log entry: Uncaught exception (see the ‘inner exception’ below) has suspended an instance of service ‘Microsoft.Solutions.BTARN.PublicResponder.PublicResponderProcess(xxxxxxxxxxxx)’.
The service instance will remain suspended until administratively resumed or terminated.
If resumed the instance will continue from its last persisted state and may re-throw the same unexpected exception.
InstanceId: xxxxxxxxxxxx
Shape name:
ShapeId: 00000000-0000-0000-0000-000000000000
Exception thrown from: segment 17, progress 13
Inner exception: Root element is missing.

Exception type: XmlException
Source: System.Xml
Target Site: Void Throw(System.Exception)
The following is a stack trace that identifies the location where the exception occured

at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
at System.Xml.XmlTextReaderImpl.Read()
at System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace)
at System.Xml.XmlDocument.Load(XmlReader reader)
at System.Xml.XmlDocument.Load(TextReader txtReader)
at Microsoft.XLANGs.Core.Value.GetXmlDocument()
at Microsoft.XLANGs.Core.Value.RetrieveAs(Type t)
at Microsoft.XLANGs.Core.Part.ProtectedRetrieveAs(Type t)
at Microsoft.XLANGs.Core.Part.RetrieveAs(Type t)
at Microsoft.XLANGs.Core.Part.get_XmlDocument()
at Microsoft.Solutions.BTARN.PublicResponder.PublicResponderProcess.segment17(StopConditions stopOn)
at Microsoft.XLANGs.Core.SegmentScheduler.RunASegment(Segment s, StopConditions stopCond, Exception& exp)