Blog down after trying to move

I tried to change the URL of my blog in the general settings section. I changed it from coerceddelusion.com/666 to just coerceddelusion.com. Immediately after that my website went down. so i went to my ftp client and moved all the files out of the 666 folder and put them in the root directory. that changed nothing. Basically now all i want to do is change it back to coerceddelusion.com/666 and ASAP. I have recently sent my link to a lot of very important people and do not want to let them down with a broken site. Please Please Please get back to me as soon as you can.