Login Problem

So.. i have installed Better WP Security plugin, i’m new to wordpress 🙂 and i think i’ve made a mistake. I don’t know how, but i can’t acces my site :)). After configuring Better WP Security i wanted to see if it works so i singed out and then… this showed up ( http://i208.photobucket.com/albums/bb100/leutz2/Untitled.gif ) . My site name is margelatu.net . I can’t acces the admin area to deactivate that plugin, it won’t work with http://margelatu.net/wp-admin/blabla it redirects me to nothing :). I have deleted the plugin from the ftp directory… What can i do?