[TruckMuddr]

If your not worried about other admins reading PM's just Find and remove this code.
Lines 41 -47

// User Is Not SuperAdmin
if (!in_array($bbuserinfo['userid'], preg_split('#\s*,\s*#s', $superadministrators, -1, PREG_SPLIT_NO_EMPTY)))
{
// Output Header/Message
print_cp_header('Your Not Authorized');
print_cp_message('You have to be a super administrator to read private messages, this can be set within config.php');
}

I'M ONLY SUGGESTING THE FOLLOWING CAUSE THERE IS SOMETHING WRONG WITH THE WAY YOURS INSTALLED, THIS IS PRETTY MUCH THE SAME THING AS BEFORE JUST NOT READING FROM CONFIG.PHP AND FOR ONLY ONE USER.


step 1:
Find code above and replace it with:

if ($bbuserinfo['userid'] == XX)
{

< REPLACE XX WITH YOUR USERID --- If you want more then one user then it should look like this if (($bbuserinfo['userid'] == XX) OR ($bbuserinfo['userid'] == XX)) >




step 2:
Find this:

/*======================================================================*\
|| This file is distributed through http://www.vBulletin.nl/
\*======================================================================*/

Above ADD:

}
else
{
// Output Header/Message
print_cp_header('Your Not Authorized');
print_cp_message('ENTER YOUR ERROR MESSAGE HERE');
}

Again as this may work, I would suggest finding what is wrong. Maybe Your Config.php is wrong someone. I've done it before.

Config.php should look something like this

// ****** SUPER ADMINISTRATORS ******
// The users specified below will have permission to access the administrator permissions
// page, which controls the permissions of other administrators
$superadministrators = 'X, X, X';

IF THIS VIOLATES SOMETHING THEN PLEASE DELETE THIS POST. JUST TRYIN TO HELP OUT.