Many people have had the sam eproblem as me with the two 404 or 500 errors in the admin section of tdo mini forms.
error when checking http://electricaldesk.com/wp-content/plugins/tdo-mini-forms/tdomf-form-post.php! This will prevent posts from being submitted. The permissions may be wrong on the tdo-mini-forms folder.
error when checking http://electricaldesk.com/wp-content/plugins/tdo-mini-forms/tdomf-form-ajax.php! This will prevent forms that use AJAX from submitting posts. The permissions may be wrong on the tdo-mini-forms folder.
Firstly i uploaded a php.ini file to the plugin folder of tdo mini forms.
I then uploaded a second php.ini file to the admin folder in tdo mini forms.
Then i changed the permissions of both files above to 755 (in not try 777)
Then presto no more errors.
Working on latest WP 2.9.1 and 2.9.2 and TDO mini forms 13.7 alongside w3 total cache and fast and secure contact form.
Hope this helps