after install sclogin on my joomla website

You need to have JFBConnect installed to add the social network integration features, like authentication, to your site. The SCLogin module by itself is an improved Joomla login module with lots of additional configuration options and features. When JFBConnect is installed, the SCLogin module will automatically display the JFBConnect login buttons as well.

I hope that helps answer your question, but if you need more help, please let me know.

Thanks,
Alex