I am attempting to move one web site to wordpress and I wish to redirect a couple of pages towards the new address. I have added the next lines in htaccess and also the redirection doesn't work when i want. Rather than opening http://domain.com/category/category1/ it opens http://domain.com/?option=com_content&task=blogcategory&id=13&Itemid=26 after i open http://domain.com/index.php?option=com_content&task=blogcategory&id=13&Itemid=26

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

Redirect 301 /index.php?option=com_content&task=blogcategory&id=13&Itemid=26 http://domain.com/category/category1/
Redirect 301 /index.php?option=com_content&task=blogcategory&id=14&Itemid=28 http://domain.com/category/category2/

RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

# END WordPress

Any suggestion?