warning message need help

[fruitcake]

YaBB SE Version:
PHP Version:
MySQL Version:
Server Platform:
Link to Forum: http://www.petfish.net/yabbse/index.php

Problem Description:
I can't get on to my forum. here is the messages i get
Warning: Unknown(/home/petfish/public_html/yabbse/index.php): failed to open stream: Permission denied in Unknown on line 0

Warning: (null)(): Failed opening '/home/petfish/public_html/yabbse/index.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in Unknown on line 0
this board has been hacked twice now. what does this mean? Is it crashed or is it telling me i can't get on or what? I'm just a member i'm not an administrator or moderator or nothing I'm just trying to figure out whats going on.

[[Unknown]]

Looks like a freaky chmod issue...

-[Unknown]