[TYPO3] realurl configuration problem

[Nirmalya]

To configure "realurl "  extension
i have configure my website with this following steps below:~

1. "_.htaccess" in  root of your TYPO3-installation
added Lines:
   RewriteEngine On
   RewriteRule ^typo3$ - [L]
   RewriteRule ^typo3/.*$ - [L]
   RewriteCond %{REQUEST_FILENAME} !-f
   RewriteCond %{REQUEST_FILENAME} !-d
   RewriteCond %{REQUEST_FILENAME} !-l
   RewriteRule .* index.php

2. TsConfig :
config.simulateStaticDocuments = 0
config.prefixLocalAnchors = all
config.tx_realurl_enable = 1
config.baseURL = 1
config.baseURL = http://localhost/myWebsite/

3. realurl/ext_localconf.php
$TYPO3_CONF_VARS['SC_OPTIONS']['t3lib/class.t3lib_tstemplate.php']['linkData-PostProc'][] 
= 'EXT:realurl/class.tx_realurl.php:&tx_realurl->encodeSpURL';

$TYPO3_CONF_VARS[’SC_OPTIONS’][’tslib/class.tslib_fe.php’][’checkAlternativeIdMethods-PostProc’][] 
= ‘EXT:realurl/class.tx_realurl.php:&tx_realurl->decodeSpURL’;

$TYPO3_CONF_VARS['FE']['addRootLineFields'].= 
',tx_realurl_pathsegment,title';

4.typo3conf/localconf.php
$TYPO3_CONF_VARS['EXTCONF']['realurl']['_DEFAULT'] = array(
      'init' => array(
          'enableCHashCache' => 1,
          'enableUrlDecodeCache' => 0,
          'enableUrlEncodeHash' => 0,
          'appendMissingSlash' =>'ifNotFile'
      ),
	 'preVars' => array(
			array(
				'GETvar' => 'no_cache',
				'valueMap' => array(
					'nc' => 1,
					),
				'noMatch' => 'bypass',
				),
			),

	 'fileName' => array (
          'defaultToHTMLsuffixOnPrev' => 1,
          'index' => array(
              'backend.php' => array(
                  'keyValues' => array (
                      'type' => 100,
                  )
              ),
              'print' => array(
                  'keyValues' => array(
                      'type' => 98,
                  )
              ),
          ),
      ),
      'postVarSets' => array(
          '_DEFAULT' => array (
              'article' => array(
                  array(
                      'GETvar' => 'tx_ttnews[tt_news]',
                  ),
                  array(
                      'GETvar' => 'tx_ttnews[backPid]',
                  ),
              ),
              'category' => array(
                  array(
                      'GETvar' => 'tx_ttnews[cat]',
                  ),
              ),
              'neste' => array(
                  array(
                      'GETvar' => 'tx_ttnews[pointer]',
                  ),
              ),
          ),
      ),
    'pagePath' => array(
          'type' => 'user',
          'userFunc' => 
'EXT:realurl/class.tx_realurl_advanced.php:&tx_realurl_advanced->main',
          'spaceCharacter' => '-',
          'languageGetVar' => 'L',
          'expireDays' => 3
      ),
);


$TYPO3_CONF_VARS['EXTCONF']['realurl']['http://localhost/myWebsite']
= $TYPO3_CONF_VARS['EXTCONF']['realurl']['_DEFAULT'];

$TYPO3_CONF_VARS['EXTCONF']['realurl']['http://localhost/myWebsite']['pagePath']['rootpage_id'] 

= 1;

Problem:
Initially:  About Us page was
<a href="http://localhost/myWebsite/index.php?id=4" >About Us</a> and 
was working as it was.

but Now for "realurl" configuration it changed as
<a href="about-us.html">About Us</a> after clicking on this link "error: 
404" is shown i.e. about-us.html does not exist