Help, I got a problem, need help!

[eluser]tomcode[/eluser]
I do not know Your flavour of .htaccess, but maybe You need to set the RewriteBase

RewriteBase /myci
RewriteCond $1 !^(index\.php|images|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]

Here's what I am using, I set the path /myci for Your installation :

# The if clause does not work on all servers
<IfModule mod_rewrite.c>
RewriteEngine on

# Take out index.php
RewriteBase /myci
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1

</IfModule>