A wp-config.php Problem

The problem: when I try to go to the 2nd page on my blog I get the following error:

Warning: require_once(../wp-config.php) [function.require-once]: failed to open stream: No such file or directory in /home5/therigh8/public_html/admin.php on line 7

Fatal error: require_once() [function.require]: Failed opening required ‘../wp-config.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home5/therigh8/public_html/admin.php on line 7

I have checked and both the “admin.php” and “wp-config.php” parts are there. What gives? Thanks in advance!