Host: Powweb
I d/l'd 3.2.3.....upped it to my root (named directory cannabiscove) and followed these instructions:
1. Quick install
If you have basic knowledge of using FTP and are sure your hosting service or server will run phpBB3 you can use these steps to quickly get started. For a more detailed explanation you should skip this and go to section 2 below.
Decompress the phpBB3 archive to a local directory on your system.
Upload all the files contained in this archive (retaining the directory structure) to a web accessible directory on your server or hosting account.
Change the permissions on config.php to be writable by all (666 or -rw-rw-rw- within your FTP Client)
Change the permissions on the following directories to be writable by all (777 or -rwxrwxrwx within your FTP Client):
store/, cache/, files/ and images/avatars/upload/.

Click the INSTALL tab, follow the steps and fill out all the requested information.
Change the permissions on config.php to be writable only by yourself (644 or -rw-r--r-- within your FTP Client)
phpBB3 should now be available, please MAKE SURE you read at least Section 6 below for important, security related post-installation instructions, and also take note of Section 7 regarding anti-spam measures.
When I point my browser here: http://www.tn420.us/cannabiscove/install/app.php I get a 500 Internal Server Error
Any help will be greatly appreciated.