HTML Form to > New Post

I am looking to have a form I have created, use the field values and submit them into a new post..

I actually want them to create a new topic in bbpress, but it appears bbpress is using the wordpress wp_posts tables anyways. It looks like only the post_type is the difference.

I have got the form fields to post like this, with 1,2,3,4,5 being the element names.. Although, it will not create a new post or topic doing it this way, so I must be missing something. Any help would be very much appreciated!

Thanks

<?php
$dbhost  = 'localhost';
$dbname  = '***';
$dbuser  = '***';
$dbpass  = '***'; 

$con = mysql_connect($dbhost, $dbuser, $dbpass);

if($con == FALSE)
{
    echo 'Cannot connect to database' . mysql_error();
}
else
{
    echo 'Connected to database';
}

mysql_select_db($dbname, $con);

$sql="INSERT INTO wp_posts (post_type, post_parent, post_title, post_content, post_author)
VALUES
('$_POST[2]','$_POST[2]','$_POST[3]','$_POST[4]','$_POST[5]')";

if (!mysql_query($sql, $con))
{
    die('Error: ' . mysql_error());
}
echo "Form Submitted";

mysql_close($con)
?>