WordPress doesn’t receive those requests, so the server 404 displays. If you want WordPress to handle all 404s, use mod_rewrite Pretty Permalinks rather than PATHINFO permalinks. The requirements are detailed in Using Permalinks.
It seems you do not have a template for your custom taxonomy. I do not think so single.php will be used for this purpose. Have a look on this ARTICLE.. Look at the hierarchy,,, I think in your case you need taxonomy-soortpost.php Taxonomy hierarchy: taxonomy-{taxonomy}-{term}.php taxonomy-{taxonomy}.php tag-{slug}.php tag-{id}.php category-{slug}.php category-{ID}.php
After a lot searching, I have gotten the solution of this problem from the web. A similar problem is discussed on this URL. And solution is given on 7th page of this URL.
There are a number of reserved post type names in WordPress that you can’t overwrite. They can be found on the codex: https://codex.wordpress.org/Function_Reference/register_post_type ‘post’ is one of them.
define( ‘WP_HOME’, ‘http://example.com’ ); define( ‘WP_SITEURL’, ‘http://example.com’ ); Add this to your wp-config.php which you can find in the root of your website. Remember to change example.com to your URL.
Why not post it on the dev4press.com forum? They have really good support. Milan is pretty quick to respond too. I haven’t yet tried using my version of this plugin on 3.1. Just GD Press Tools.
Setup 301: Moved Permanently redirects! This post should be helpful
Maybe try clearing out the action attribute: action=””
404 is failure to communicate with the server. So either your configuration is not complete for the new server (for ex: permalinks), or your server needs optimization. You could try checking the server error log or php error log first.
As suggested by Bainternet, prefix all the field names.