[eluser]BrianDHall[/eluser]
Believe it or not, that's good!
The problem is Apache's handling of url rewriting. Your server is receiving the request for index.php/ and going "Huh, there is no index.php directory - return 404".
By the way, you are getting the standard 404 message - not the codeigniter 404 message, right?
Assuming you aren't getting the CI's version of 404 which is so different than the 404 you would have seen anywhere before, you can now be pretty sure of the problem. It's url translating.
To further make absolutely certain that this is the case before you go on a wild goose chase, open your config.php and go to $config['enable_query_strings'] and set it to TRUE.
Now try this: mywebsite.com/index.php?c=welcome&m=index
If that works, try: mywebsite.com/index.php?c=test&m=index
If that works as I think it will, then your problem is definately an Apache/htaccess one. First, you'll need to make sure your host server is configured to allow mod_rewrite and permits you to use htaccess files in your directories. Then you'll need to test various examples of htaccess and see if you can get anything working, with or without index.php.
Once you have the right settings everything should work as intended and you will, hopefully, be good to go.
