ICM_HTTP_CONNECTION_FAILED

Hi all

    Can anybody suggest me a way to solve the following error. I am getting this error while sending data through HTTP adapter.

  <?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>XIAdapter</SAP:Category>

  <SAP:Code area="PLAINHTTP_ADAPTER">ATTRIBUTE_CLIENT</SAP:Code>

  <SAP:P1>400</SAP:P1>

  <SAP:P2>ICM_HTTP_CONNECTION_FAILED</SAP:P2>

  <SAP:P3 />

  <SAP:P4 />

  <SAP:AdditionalText />

  <SAP:ApplicationFaultMessage namespace="" />

  <SAP:Stack>HTTP client. Code 400 reason ICM_HTTP_CONNECTION_FAILED</SAP:Stack>

  <SAP:Retry>M</SAP:Retry>

  </SAP:Error>

Thankyou