facebook open graph url is not working in joomla 1.5

facebook open graph url is not working in joomla 1.5

All of a sudden, I have got OG URL issue in my personal site.
When i debug to facebook debugger tool it shows godaddy workspace login.
Site is perfectly working fine, but i couldn't get how it's taking godaddy
login page.
Object Properties
og:url: https://login.secureserver.net/?app=mmail
og:type: website
og:title: Workspace Login
og:updated_time: 1378345491
Redirect Path
original:
http://www.nirmal.com.np/home/the-five-dos-and-donts-of-facebook-posts.html
303:
http://pda.nirmal.com.np/home/the-five-dos-and-donts-of-facebook-posts.html
302: https://login.secureserver.net/?app=mmail
Final URL is in bold (this is the URL we tried to extract metadata from).
Here is the graph shown by facebook:
https://graph.facebook.com/10150200874963387
{
"id": "10150200874963387",
"url": "https://login.secureserver.net/?app=mmail",
"type": "website",
"title": "Workspace Login",
"updated_time": "2013-09-05T01:46:10+0000",
"created_time": "2011-04-21T07:03:42+0000",
"is_scraped": true
}
What's creating this issue?
I am using joomla 1.5. I checked all SEO plugins and everything, couldn't
figure out.
Thank you for your help guys!