php programming against FRED

I have tryed the client_example.php script. Whatever i do, it answeres: Error: fred_client not instaled properly. See help or set prefix of path. As far as i know fred_client is working on the machine as it should. So i want to ask these questions: 1) What should i write in the $exec_path field ? The path to what ? 2) Where (in which file) do i set the PHP output mode ? 3) My configuration file is in /etc/fred. Should i move it too /etc ? regards Petur This email and its attachments may be confidential and are intended solely for the use of the individual to whom it is addressed. If you are not the intended recipient or authorized to receive information for the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. If the email contains proposals, they are valid for 30 days following the date of email transmission. Finally, the recipient should check this email and any attachment for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by email.