PI 731 - HTTP (error code: 401 , error text: ICM_HTTP_CONNECTION_BROKEN)

Hi Experts,

We are facing an issue when trying to go from file to proxy

INTERNAL">CLIENT_RECEIVE_FAILED

<SAP:P1>401</SAP:P1>

<SAP:P2>ICM_HTTP_CONNECTION_BROKEN</SAP:P2>

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

- <!--  Empfängergruppierung

  -->

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

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

  <SAP:Code area="INTERNAL">CLIENT_RECEIVE_FAILED</SAP:Code>

  <SAP:P1>110</SAP:P1>

  <SAP:P2>HTTPIO_PLG_CANCELED</SAP:P2>

  <SAP:P3 />

  <SAP:P4 />

  <SAP:AdditionalText />

  <SAP:Stack>Error while receiving by HTTP (error code: 110 , error text: HTTPIO_PLG_CANCELED)</SAP:Stack>

  <SAP:Retry>A</SAP:Retry>

  </SAP:Error>

We already change parameters:

rdisp/keepalive_timeout 300

rdisp/max_wprun_time 3600

icm/server_port_0  PROT=HTTP,PORT=50200,TIMEOUT=60,PROCTIMEOUT=1200

icm/HTTP/max_request_size_KB  -1

Any clue?