removing index.php from url and load model eror

[eluser]arif[/eluser]
hello every ones


i`m kindly new to CI . and i start to learn using 2.0.2 now i have two problem.

i had an eror when trying to remove index.php on URI, i had trying to add this .htaccess to my .htaccess file conf

Code:

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /SabaPay

    RewriteCond %{REQUEST_URI} ^system.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]
    
    RewriteCond %{REQUEST_URI} ^application.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]

    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>  

<IfModule !mod_rewrite.c>
    # If we don't have mod_rewrite installed, all 404's
    # can be sent to index.php, and everything works as normal.
    # Submitted by: ElliotHaughin

    ErrorDocument 404 /index.php
</IfModule>

but wont work . and also i had my modrewrite but i still cannot remove index.php from url
i had remove inde.php in config.php to

Code:

$config['index_page'] = "";

also

Code:

$config['uri_protocol']    = 'REQUEST_URI';

any suggestion ?

the second is
i try to make blog that require login to made a post
the login succusfull but neither the blog. becouse i make two model that is user model and blog model, when i load blog model i hadd an eror 500 but when i adding my blog model method into user model that work succesfully,

my question is why i cannot load the blog model in my case ?

thank for your help

regard

Arif