wp-includes\pluggable.php on line 866

I have tried everything I understand…. I have checked for whitespace in the config file. I have checked it in the pluggable file. I deleted the Askmet plugin. I deleted the theme that I installed when I first downloaded WordPress and logged in. Now the only themes in my file manager are twentyeleven and twentyten. I don’t know which is or should be activated. I do not know much about ftp and have just downloaded Filezilla, though I haven’t set it up yet because my server allows me to change files on their website panel.

Please help me find a solution to this problem because I cannot log in or see anything but this message!
http://smokymountainclayguild.com/WP_index/wp-login.php

Any more ideas? Walk me through something?

And once again, I did check the <?php and ?> on each page and checked for extra spaces.

THank you for your help!