Social Login Buttons not visible

Hi
I am working on www.glansbeton.be/.
When i click on the Login Button the modal appears with no social login buttons(facebook, twitter etc)
In firefox when i click on the modal and click inspect element, after that when i drag the firbug window over the login modal, the social icons started appearing.
I don't understand the issue.
Please help

Thanks
Baljinder Singh

Hi
This issue has been resolved, but now there is one more issue.After login with facebook, i am redirected to www.glansbeton.be/#_=_ and the the page refresh again and again
Any help will be appreciated.

Thanks
Baljinder