Eroor logging into admin panel

I changed some settings on our admin panel and have been unable to resolve.

Getting this error:

The page isn't redirecting properly

Firefox has detected that the server is redirecting the request for this address in a way that will never complete.

This is in a MVC PHP setting.

someone would probably have to look at the raw http headers to see how it is redirecting. I can help if you want, but it would probably mean giving me access to the admin panel so I can see the problem and check it out for myself. other than that, "admin panel" could mean just about any php app out there as most will come with an "admin panel".

what app are you using for the mvc (or mvc framework perhaps)?
what settings/files did you change?
can you just undo the changes? (ideally undo changes until it is fixed then redo changes that don't break it)
do you have backups of changed files/db dump that you can restore? (if not, why not? as this would be the first line of defense when something breaks for any real production site/system/production/enterprise app)

This code had to be added for the host server to be able to negotiate the secure login properly:

if (isset($_SERVER['ORIG_PATH_INFO']))
{
$_SERVER['PATH_INFO'] = $_SERVER['ORIG_PATH_INFO'];
}

if (get_magic_quotes_gpc()) {
$process = array(&$_GET, &$_POST, &$_COOKIE, &$_REQUEST);
while (list($key, $val) = each($process)) {
foreach ($val as $k => $v) {
unset($process[$key][$k]);
if (is_array($v)) {
$process[$key][stripslashes($k)] = $v;
$process[] = &$process[$key][stripslashes($k)];
} else {
$process[$key][stripslashes($k)] = stripslashes($v);
}
}
}
unset($process);
}

Thanks for your viewing and input