Internal Server Error when installing opencart

Question

I'm new to open cart , I jsut uploaded the files to the server and trying to install it but invaine , it gives me 500 internal server error , and it seems to be from the .htacess file

it had been .htacess.txt , I renamed to .htacess and removed the comments from the commands it 's said to remove to git rid of this error but it still the same ! how to fix this ?

and here is the online files http://idev-inc.com/projects/idev_market.com/

  # 1.To use URL Alias you need to be running apache with mod_rewrite enabled. 

 # 2. In your opencart directory rename htaccess.txt to .htaccess.

 # For any support issues please visit: http://www.opencart.com

 #Options +FollowSymlinks

  # Prevent Directoy listing 
 Options -Indexes

 # Prevent Direct Access to files
 <FilesMatch "\.(tpl|ini|log)">
  Order deny,allow

 </FilesMatch>

  # SEO URL Settings
 RewriteEngine On
 # If your opencart installation does not run on the main web folder make sure you           folder it does run in ie. / becomes /shop/ 

 RewriteBase /
 RewriteRule ^sitemap.xml$ index.php?route=feed/google_sitemap [L]
 RewriteRule ^googlebase.xml$ index.php?route=feed/google_base [L]
 RewriteRule ^download/(.*) /index.php?route=error/not_found [L]
 RewriteCond %{REQUEST_FILENAME} !-f
 RewriteCond %{REQUEST_FILENAME} !-d
 RewriteCond %{REQUEST_URI} !.*\.(ico|gif|jpg|jpeg|png|js|css)
 RewriteRule ^([^?]*) index.php?_route_=$1 [L,QSA]

 ### Additional Settings that may need to be enabled for some servers 
 ### Uncomment the commands by removing the # sign in front of it.
 ### If you get an "Internal Server Error 500" after enabling any of the following      settings, restore the # as this means your host doesn't allow that.

 # 1. If your cart only allows you to add one item at a time, it is possible           register_globals is on. This may work to disable it:
  php_flag register_globals off

 # 2. If your cart has magic quotes enabled, This may work to disable it:
  php_flag magic_quotes_gpc Off

 # 3. Set max upload file size. Most hosts will limit this and not allow it to be      overridden but you can try
   php_value upload_max_filesize 999M

 # 4. set max post size. uncomment this line if you have a lot of product options or      are getting errors where forms are not saving all fields
   php_value post_max_size 999M

 # 5. set max time script can take. uncomment this line if you have a lot of product      options or are getting errors where forms are not saving all fields
   php_value max_execution_time 200

 # 6. set max time for input to be recieved. Uncomment this line if you have a lot of      product options or are getting errors where forms are not saving all fields

php_value max_input_time 200

 # 7. disable open_basedir limitations
   php_admin_value open_basedir none

Answer 1

By removing the php.ini file , it may conflict the server config , remove it and it will be intialized auto again !

Answer 2

On certain web hosting servers many of the Apache's settings are not editable with .htaccess files. In such cases the settings in Your .htaccess interfering with this prohibition will cause a 500 internal server error.

On my hosting I had to comment out (remove) everything except RewriteEngine settings and Options +FollowSymlinks. Each other setting (even Options -Indexes) was causing me 500 error.

There should be some administrator's manual provided by Your web hosting provider (try to search their knowledge base or ask them directly) about which settings are allowed in .htaccess files.