Pavan,
Your certificate(your server) name is shown by default at the bottom) is not in the trusted publishers list provided by the browser (you can check it under Internet options--> Content -->Certificates--> Trusted Root Certification Authorities)
You need to get the SSL certified with the trusted publishers like Geo trust/Symantec or any other vendors provided by SAP. Please visit SSL server certificates section.
Regards,
Avinash