Contact Form error

Hi,

I have a contact form that returns the following error after you push the submit button:

Warning: Cannot modify header information - headers already sent by (output started at /home/domain/public_html/folder/contact/process_form.php:1) in /home/domain/public_html/folder/contact/process_form.php on line 84

Code (markup):

The 84th line is the line that sends the submittion approved notice and returns the user to the homepage - using a different php file.

Would appriciate if you have any ideas on how to solve this.

Thanks,

 

Hello,

if you use include or require in your page. don't use similar header in current page and included page. This is important header must be top of the codes. Don't use headers bottom of html codes.

 

check at the bottom of the file if there is empty lines , even this can cause this kind error .

 

You might want to show the code.

 

I do not have any empty lines & I don't know exactly which file code to show.

The only things I've changed in this source codes is the language of the free text and I've changed the file from ANSI to UTF-8 with notepad, so that my language would be accepted.
Could that cause the problem? and if so how would I fix that?