After a fresh install: Fatal Error: Class ACP either does not exist!

[LotusRising]

Hey, I'm sorry I feel like a bother. I tried to install the script, the installation wizard went smoothly. Everything else runs smoothly too, except I can not access my own Admin CP.

The error message seems a little different that any others I've seen reports about. I looked and searched for an answer on here.

Warning: include_once(.php) [function.include-once]: failed to open stream: No such file or directory in /home/smystic/public_html/classes/class_urlparser.php on line 33

Warning: include_once() [function.include]: Failed opening '.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/smystic/public_html/classes/class_urlparser.php on line 33

Fatal error: Uncaught exception 'Exception' with message 'Fatal Error: Class ACP either does not exist!' in /home/smystic/public_html/classes/class_loader.php:26 Stack trace: #0 [internal function]: Loader->load('ACP') #1 /home/smystic/public_html/classes/class_urlparser.php(36): spl_autoload_call('ACP') #2 /home/smystic/public_html/classes/class_input.php(79): UrlParser->parse() #3 /home/smystic/public_html/classes/class_input.php(56): Input->initialize() #4 /home/smystic/public_html/classes/class_mysidia.php(133): Input->__construct() #5 /home/smystic/public_html/classes/class_mysidia.php(42): Mysidia->parseinput() #6 /home/smystic/public_html/inc/init.php(27): Mysidia->initialize() #7 /home/smystic/public_html/admincp/index.php(4): require('/home/smystic/p...') #8 {main} thrown in /home/smystic/public_html/classes/class_loader.php on line 26

I am on x10hosting right now, and using version 1.3.2 of the script.
Edit: before trying to access to Admin CP, I did log in to my own site.