file channal : connection broken.
No connectivity from file zilla, winscp clients also.
Finally approached bank site network people.
( they are saying no request from sap pi (specific client))
Finally updated the same message to sap basis
Reason for not working:
1.What ever the ip address given by bank team, is not updated in host file ( nearly 5 given, only 2 are updated).
2. Also network team, added few more entries in the dns settings( firewall related connections).