SECURITY_APPLY_ERROR

Hi,experts:

  I want to encrypt message while transporting B2B data,but the following error message displayed in SXI_MONITOR:

  <?xml version="1.0" encoding="UTF-8" standalone="yes" ?>

- <!--  Call Adapter

  -->

- <SAP:Error xmlns:SAP="http://sap.com/xi/XI/Message/30" xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/" SOAP:mustUnderstand="">

  <SAP:Category>XIServer</SAP:Category>

  <SAP:Code area="SECURITY">SECURITY_APPLY_ERROR</SAP:Code>

  <SAP:P1>Sign and Encrypt Message</SAP:P1>

  <SAP:P2 />

  <SAP:P3 />

  <SAP:P4 />

  <SAP:AdditionalText>Signature error Error during the processing of the encryption element. Error was: com.sap.engine.lib.xml.signature.SignatureException Error while encrypting raw: algorithm:http://www.w3.org/2001/04/xmlenc#tripledes-c</SAP:AdditionalText>

  <SAP:ApplicationFaultMessage namespace="" />

  <SAP:Stack>Error during message security handling in outbound channel: Security profile 'Sign and Encrypt Message'</SAP:Stack>

  <SAP:Retry>M</SAP:Retry>

  </SAP:Error>

How to solve it?

Regards

Ming