Yes, that version of SCLogin is incompatible with your version of JFBConnect. You will need SCLogin v4.0.3.
I have temporarily published SCLogin v4.0.3 for you at
www.sourcecoast.com/index.php?option=com_ars&view=release&id=55 - please let me know when you have downloaded it and I will unpublish it again.
You can also find the SCLogin package in your original JFBConnect installation package zip under /packages/modules/mod_sclogin.zip
-Melissa