I have Captcha implemented, but it isn't stopping spam from getting through. Help!

Here is something you can try:

1. Create a new hidden input element as the first element of your form.

NAME: yourfirstname

VALUE: empty (don't put anything in the value field)

2. In your form's properties > Advanced tab > More Options > Submit Pieces > Before Submit, add the following code: 

$this->execPieceByName('ff_InitLib');
if( ff_getSubmit('yourfirstname') != '' )
{
     exit;
}

The regular bots will try to fill in this element and before form submit. The code above will exit the application if this element is not empty, which would result in the submission not being stored.