Error after activating SEO Settings in Joomla 2.5 - joomla2.5

Question

I am using Shape5 Corporate Response template for Joomla 2.5
In order for me to activate the SEO freidnly website I had to:
1- Change htaccess.txt to .htaccess
2- In global configuration change Search Engine Friendly URLs from No to Yes
3- Change Use URL rewriting From No to Yes
after that the template runs but the menu that I created does not work and when I click on it, it says:
Not Found
The requested URL /contact was not found on this server.
Additionally, a 404 Not Found error was encountered while trying to
use an ErrorDocument to handle the request.
I already did this test :
http://docs.joomla.org/How_to_check_if_mod_rewrite_is_enabled_on_your_server
and my mod rewrite is enabled.
also I edited "# RewriteBase /" to "RewriteBase /" in htaccess but no luck.
here is my htaccess:
> # #package Joomla
> # #copyright Copyright (C) 2005 - 2012 Open Source Matters. All rights reserved.
> # #license GNU General Public License version 2 or later; see LICENSE.txt
> ##
>
> ##
> # READ THIS COMPLETELY IF YOU CHOOSE TO USE THIS FILE!
> #
> # The line just below this section: 'Options +FollowSymLinks' may cause problems
> # with some server configurations. It is required for use of mod_rewrite, but may already
> # be set by your server administrator in a way that dissallows changing it in
> # your .htaccess file. If using it causes your server to error out, comment it out (add # to
> # beginning of line), reload your site in your browser and test your sef url's. If they work,
> # it has been set by your server administrator and you do not need it set here.
> ##
>
> ## Can be commented out if causes errors, see notes above. Options +FollowSymLinks
>
> ## Mod_rewrite in use.
>
> RewriteEngine On
>
> ## Begin - Rewrite rules to block out some common exploits.
> # If you experience problems on your site block out the operations listed below
> # This attempts to block the most common type of exploit `attempts` to Joomla!
> #
> # Block out any script trying to base64_encode data within the URL. RewriteCond %{QUERY_STRING} base64_encode[^(]*\([^)]*\) [OR]
> # Block out any script that includes a <script> tag in URL. RewriteCond %{QUERY_STRING} (<|%3C)([^s]*s)+cript.*(>|%3E) [NC,OR]
> # Block out any script trying to set a PHP GLOBALS variable via URL. RewriteCond %{QUERY_STRING} GLOBALS(=|\[|\%[0-9A-Z]{0,2}) [OR]
> # Block out any script trying to modify a _REQUEST variable via URL. RewriteCond %{QUERY_STRING} _REQUEST(=|\[|\%[0-9A-Z]{0,2})
> # Return 403 Forbidden header and show the content of the root homepage RewriteRule .* index.php [F]
> #
> ## End - Rewrite rules to block out some common exploits.
>
> ## Begin - Custom redirects
> #
> # If you need to redirect some pages, or set a canonical non-www to
> # www redirect (or vice versa), place that code here. Ensure those
> # redirects use the correct RewriteRule syntax and the [R=301,L] flags.
> #
> ## End - Custom redirects
>
> ##
> # Uncomment following line if your webserver's URL
> # is not directly related to physical file paths.
> # Update Your Joomla! Directory (just / for root).
> ##
>
> # RewriteBase /
>
> ## Begin - Joomla! core SEF Section.
> # RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
> #
> # If the requested path and file is not /index.php and the request
> # has not already been internally rewritten to the index.php script RewriteCond %{REQUEST_URI} ^GET
> # and the request is for something within the component folder,
> # or for the site root, or for an extensionless URL, or the
> # requested URL ends with one of the listed extensions RewriteCond %{REQUEST_URI} /component/|(/[^.]*|\.(php|html?|feed|pdf|vcf|raw))$
> [NC]
> # and the requested path and file doesn't directly match a physical file RewriteCond %{REQUEST_FILENAME} !-f
> # and the requested path and file doesn't directly match a physical folder RewriteCond %{REQUEST_FILENAME} !-d
> # internally rewrite the request to the index.php script RewriteRule .* index.php [L]
> #
> ## End - Joomla! core SEF Section.
How can I fix this issue ?

Answer 1

I found the solution, just add replace this code in your .htaccess file:
AddHandler x-httpd-php5 .php
AddHandler x-httpd-php .php4
##
# #version $Id: htaccess.txt 14401 2010-01-26 14:10:00Z louis $
# #package Joomla
# #copyright Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
# #license http://www.gnu.org/copyleft/gpl.html GNU/GPL
# Joomla! is Free Software
##
#####################################################
# READ THIS COMPLETELY IF YOU CHOOSE TO USE THIS FILE
#
# The line just below this section: 'Options +FollowSymLinks' may cause problems
# with some server configurations. It is required for use of mod_rewrite, but may already
# be set by your server administrator in a way that dissallows changing it in
# your .htaccess file. If using it causes your server to error out, comment it out (add # to
# beginning of line), reload your site in your browser and test your sef url's. If they work,
# it has been set by your server administrator and you do not need it set here.
#
#####################################################
## Can be commented out if causes errors, see notes above.
Options +FollowSymLinks
#
# mod_rewrite in use
RewriteEngine On
########## Begin - Rewrite rules to block out some common exploits
## If you experience problems on your site block out the operations listed below
## This attempts to block the most common type of exploit `attempts` to Joomla!
#
## Deny access to extension xml files (uncomment out to activate)
#<Files ~ "\.xml$">
#Order allow,deny
#Deny from all
#Satisfy all
#</Files>
## End of deny access to extension xml files
RewriteCond %{QUERY_STRING} mosConfig_[a-zA-Z_]{1,21}(=|\%3D) [OR]
# Block out any script trying to base64_encode crap to send via URL
RewriteCond %{QUERY_STRING} base64_encode.*\(.*\) [OR]
# Block out any script that includes a <script> tag in URL
RewriteCond %{QUERY_STRING} (\<|%3C).*script.*(\>|%3E) [NC,OR]
# Block out any script trying to set a PHP GLOBALS variable via URL
RewriteCond %{QUERY_STRING} GLOBALS(=|\[|\%[0-9A-Z]{0,2}) [OR]
# Block out any script trying to modify a _REQUEST variable via URL
RewriteCond %{QUERY_STRING} _REQUEST(=|\[|\%[0-9A-Z]{0,2})
# Send all blocked request to homepage with 403 Forbidden error!
RewriteRule ^(.*)$ index.php [F,L]
#
########## End - Rewrite rules to block out some common exploits
# Uncomment following line if your webserver's URL
# is not directly related to physical file paths.
# Update Your Joomla! Directory (just / for root)
RewriteBase /
########## Begin - Joomla! core SEF Section
#
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !^/index.php
RewriteCond %{REQUEST_URI} (/|\.php|\.html|\.htm|\.feed|\.pdf|\.raw|/[^.]*)$ [NC]
RewriteRule (.*) index.php
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]
#
########## End - Joomla! core SEF Section