Hi Swapna,
I was also facing the same issue 10 days back.For me I was also not able to open the url.
Can you please check the below thread.
http://scn.sap.com/thread/3449852
You can test the soap messages from SOAP UI
Set Below things
1. Authentication Type = Preemptive
2. username
3 password
Please try doing this.
Regards,
Abhi