Rajat,
There's 2 options. Both of which I'm highly confident will work.
1) We just re-enabled JFBConnect 3.0.0 in the download area. If you'd like to download that, uninstall the current version and upgrade, that should fix your issue.
2) This involves a minor code change, but I just tested it on your site manually, and it seemed to work:
In the /components/com_jfbconnect/libraries/facebook.php file, look for the 'initJavascript' function. In that function, you'll see the following code at about line 107:
if (FB.getSession())
{
self.location = "{$optionPermsUrl}";
}
Update that self.location line to the following, replacing $optionPermsUrl with $loginLink
self.location = "{$loginLink}";
The 2nd option is best as you'll get some of the other bug fixes in 3.0.1. However, if you're hesitant to modify code, the first option would probably be best.
Hope this helps, and sorry for the earlier delay in responding. This should get you going, but if not, you know where to find us.
Thanks!