.htaccess使瀏覽器打不開解決思路

.htaccess使瀏覽器打不開
一頁面很正常，可是當我在根目錄下放入.htaccess，該頁面再也打不開了，
.htaccess的內容:
# Helicon ISAPI_Rewrite configuration file# Version 3.1.0.66
RewriteEngine On
RewriteRule ^index.html$ index.php
RewriteRule ^index_ok.html$ index_ok.php：
頁面顯示：


Internal Server Error


The server encountered an internal error or misconfiguration and was unableto complete your request.
Please contact the server administrator, [email protected] and inform them of thetime the error occurred, and anything you might have done that may have causedthe error.
More information about this error may be available in the server errorlog.

------解決方案--------------------
#有沒有加這個？
RewriteEngine On
RewriteBase /
RewriteRule ^index.html$ index.php
RewriteRule ^index_ok.html$ index_ok.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

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