In the W3TC compatibility check I see that W3TC is looking to write to /.htaccess
shouldn’t it be directed to:
/home/andrew6/public_html/.htaccess
W3TC compatibility text:
/.htaccess: Not write-able
/home/andrewm6/public_html/wp-content: OK
/home/andrewm6/public_html/wp-content/uploads/2012/03: OK