I have Flexicontact Plus and JoomSEF installed. Does anybody know how to make these two components work together in joomla 2.5.6?

In old joomla everything works fine. Now I have the newest joomla and of course the newest components. Normal joomla contact form works fine but flexicontact does not. When I disable joomsef flexicontact work but I want both to work togeher.

The solution in which I disable the SEF URLs only for Flexi Contact componentdoes not change the situation. When I push send button it redirects me to index.php.

Best regards
Marcin Lorkowski