I renamed my Admin folder and updated configure.php and uploaded it and I still cannot access the Admin area. The new URL gives "Page Not Found" (using my custom 404) and the old URL gives a default 404 page...I've re-uploaded several times...I don't know what the problem is...

Edit:

Apparently it doesn't like my .htaccess file:

This is all it has in it:

Code:
#.htaccess to prevent unauthorized directory browsing or access to .php files
  IndexIgnore */*
  <Files *.php>
   Order Deny,Allow
   Deny from all
  </Files>

 #add the following to protect against people discovering what version your spiders.txt file is
  <Files *.txt>
   Order Deny,Allow
   Deny from all
  </Files>