Error (2): session_start() [<a href='function.session-start'>function.session-start</a>]:
Cannot send session cache limiter - headers already sent
(output started at /folder/folder/folder/folder/file1.php:N1)
This error usually happens if you edit the generated code or do a PHP include() of the generated code in your PHP file.
The form processor script calls session_start() to start the user session. However, no output (not even a blank character) should be sent before the session_start() call. Otherwise PHP assumes that the content part is already started (session belongs to the header part)
Compare the error string that you see with the error message shown above (in red color) find out what is file1.php in your error. The error says that at line N1 of file1.php it started sending output.
If, for example the file is this way:
. . . <?php(dots represent blank lines)
<?phpor else if the file is this way (blank lines at the end)
?> . . .edit it and delete the blank lines this way
You can't embed the form in your web page by using PHP include() or require(). To embed the form in your web page: