Hi Manoj,
1. I assume that this is with the portal?
2. Which version of NetWeaver are you running?
3. What is the server name in the certificate? It looks like 'localhost' above, and that's not a good idea.
4. Has the certificate request been raised and sent?
5. If so, has it been returned?
can you give us some more info so that we can assist?
Regards,
Graham