I have FSCF working on one website and just installed and configured identically for another website (changing to the new domain etc of course) but the submit appears to be submitting to the search form on the page and so gives a "Sorry not found" error rather than sending email and redirecting.
The form is at http://counselling4change.org/contact
And on submit the URL has the form parameters filled out, but appears incorrect otherwise:
It looks like the submit button is missing FSCF <form> and submitting to the search box <form> instead. This suggests an error in the FSCF <form> HTML, but: 1) I'm not sure what, and 2) Its not something I am likely to be able to fix without editing the plugin code, which is not a solution.
What is strange is that I don't have this issue on the other website which is similar, though obviously not identical.