heya,
I had a problem with a plugin last night that caused me a blank white page. I had to do into my hosting account and delete the files to fix it.
It is important that you use the correctly login, the plugin use the WP-login and rewrite all other urls.
Like cortex123 said, you can access your site by /wp-login.php
You can also add wp-admin to the excludes field, in your settings for Maintenance Mode, in order to be able to access your admin section using yoursite.com/wp-admin
I’m having a problem logging in too, the plugin worked great for a while but now I can’t log in at all. I am using http://www.yourwebsite.com/wp-login.php but when I log in it takes me to my own maintenance page and won’t let me get in to turn it off!
Help, I’m totally shut out.
I’m not sure how to fix the plugin-specific issue, but you should be able to enter your admin panel after manually deactivating all plugins. Follow this guide:
http://codex.ww.wp.xz.cn/FAQ_Troubleshooting#How_to_deactivate_all_plugins_when_not_able_to_access_the_administrative_menus.3F
Thanks James (MacManX). I had a similar problem and the source you suggested helped me to solve it.
You help is much appreciated. Cheers!