Jan,
Your template is including only a subset of the Bootstrap Javascript files. If you open the Bootstrap JS file included on your page:
http://hostingvs.nl/testsites/rpmedical … rap.min.js

And then open the one with the SCLogin module:
http://hostingvs.nl/testsites/rpmedical … rap.min.js

At the top of the SCLogin one, you'll see that "bootstrap-modal.js" is included. Without that, the modal popup won't work. So, you'll need to enable the "Include bootstrap" option in our module and, likely, disable the reduced Bootstrap Javascript that your template is including.

I hope that helps,
Alex

Wow, thank you for your response! The problem has been solved. I didn't use the correct version of bootstrap.js because of the conflict it gives with the modal functionality of K2. But there are other ways to solve that.

No problem. It's what we're here for. If you run into anything else or have any feedback on how to make things better, just let us know.

Finally, if you haven't already, please consider leaving a rating and review for SCLogin, or our support, on the Joomla Extension Directory. It certainly isn't required, but is very appreciated:
http://extensions.joomla.org/extensions … tion/24054

Thanks, and good luck,
Alex

I've submitted a review! Thanks again

No problem for the help. Thanks so much for the review, it's very appreciated.

If you have any feedback on improvements for the SCLogin module, just let us know.

Thanks,
Alex