Authorization error for proxy in CALL Adapter step

Hi,

I have HTTP to Proxy(ECC) scenario.

While processing the file, we are getting the error "User XXXX is not authorized to use message type" in call adapter level of SXMB_MONI.

Below is the error:

<SAP:Error SOAP:mustUnderstand="1" xmlns:SAP="http://sap.com/xi/XI/Message/30" xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/">

<SAP:Category>XIProtocol</SAP:Category>

<SAP:Code area="MESSAGE">NOT_AUTHORIZED_IF_OP</SAP:Code>

<SAP:P1>PIBATCH</SAP:P1>

<SAP:P2 />

<SAP:P3 />

<SAP:P4 />

<SAP:AdditionalText />

<SAP:Stack>User XXXX is not authorized to use message type</SAP:Stack>

<SAP:Retry>M</SAP:Retry>

</SAP:Error>

I have compared the user id in ECC with other working systems and it looks same.So i am confused where to check now.(Design and config looks perfect).

Even i pinged the same url in IE and getting result as expected.(http://Serveraddress:port/sap/xi/engine?type=entry)

Recently ECC system was upgraded to EHP6 , whether this has any impact?

Thanks