the headers already sent error occurs if there is output between php tags.
the error is being reported at line 12 of the Connections/localhost.php
output started at /mnt/Target01/332078/550185/www.physiciansweightlosshouston.com/web/content/powerCMS/Connections/localhost.php:12
make sure that there are no blan lines in this file after the closing php tag ?>