A Question About Session Save Path

[Mbytes]

I'm having difficulty installing the latest trial version. My site is hosted over at bluehost. I don't understand the concepts underlying session.save.path, and I'm having a looping problem upon trying to sign in; i.e., after entering my selected screen name and password I land right back at the sign in page.

I'm using PHP 5.2.6. The local and master values for session.save.path are set to "no value." My host points to the tmp folder in my home directory as the save path. So, I'm guessing its '/home/myusername/tmp' and my sessionPath.php file looks like this:

<?php
session_save_path('/home/myusername/tmp'); // FULL SERVER PATH TO SESSION STORAGE DIRECTORY
?>

This hasn't resolved the issue and I'm feeling far out in left field on this one! Should I be shooting to set up a php.ini file in the tmp folder with the above path information? Is the sessionPath.php file even configured correctly?