help me with include function, folder problem.

hi.
ive just put this code:
<?php include(included/interested.php) ?>
<?php include(included/htmllinks.php) ?>
into www.dotalex.com/html.php

i want to include this files:
www.dotalex.com/included/htmllinks.php
www.dotalex.com/included/interested.php

but it gives me this error:

i dont have idea of what is it. whats my error?
im using godaddy hosting.

 

<?php include ("included/interested.php"); ?>
<?php include ("included/htmllinks.php"); ?>

 

as above stated use double quotes. sometimes on some servers this helps. if it does not. use the full path in double quotes always works .

TJ