Hi Gupta,
also please take into account: the destination "SAPOSS" probably refers to the support connection between your SAP system and the SAP network. There are several prerequisites necessary for this, e.g. firewall ports need to be opened, saprouters need to be installed and route tables to be customized, SAP needs to open access to its support network for you (and you need to do the same in the opposite direction...)
I recommend that you contact SAP network support and review your current setup together with them. Probably there is still some missing step, so that the IP address of the OSS system is not yet "visible" from inside your local network.
Some documentation is also available here: http://help.sap.com/saphelp_nwes73/helpdata/en/4a/461ea98d0614d2e10000000a42189b/content.htm
Best Regards, Ulrich