Operation aborted in IE6

[eluser]JMLWeb[/eluser]
Hello, I got an error when I enter to my page (http://www.jmlweb.es), but only in IE6.
I´m going crazy, please, help me!

Here are htaccess code:

RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]
RewriteRule portafolio-(.*).html portafolio/pagina/$1
RewriteRule portafolio/tipo/diseno-web-(.*).html portafolio/tipo/diseno-web/$1
RewriteRule portafolio/tipo/programacion-web-(.*).html portafolio/tipo/programacion-web/$1
RewriteRule portafolio/fecha/(.*)-(.*).html portafolio/fecha/$1/$2
RewriteRule portafolio/cliente/(.*)-(.*).html portafolio/cliente/$1/$2
RewriteRule portafolio/tecnologia/(.*)-(.*).html portafolio/tecnologia/$1/$2