Parallel Plesk – Getting a 404 error on my wordpress homepage

I am getting Error 404 – Page not found on my WordPress’ homepage. I think the rewrite rules are fine ’cause I can see the other page –http://accuratewatch.com/

But if I directly call the index.php file, I will get the desired result – http://accuratewatch.com/index.php

I think the rewrite rules are fine ’cause I can still see the other pages. I even put the redirect rule but it’s not working. Here’s the copy of my .htaccess

DirectoryIndex index.php index.html
Redirect / index.php

# BEGIN WordPress

<IfModule mod_rewrite.c>
   RewriteEngine On
   RewriteBase /
   RewriteRule ^index.php$ - [L]
   RewriteCond %{REQUEST_FILENAME} !-f
   RewriteCond %{REQUEST_FILENAME} !-d
   RewriteRule . /index.php [L]
</IfModule>

# END WordPress

I am using Parrallel Plesk and the site was working with .asp before so I override it with index.php.
Can you help me figure out the source of the problem?