.htaccess is hijacking my robots.txt?

My .htaccess file has rewrite commands on it. I thought it was corrupted so I tried to take it down, but none of my interior pages were displaying. It seems to create a robots.txt that disallows access to my entire site…even when I upload a robots.txt file that allows all access. Here is what my .htaccess file is now…

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

# END WordPress

I welcome you much appreciated help in solving this mystery! Thank you!