First, it's .htaccess - lose the extra 't'.
Second, try this in your .htaccess and see if it helps.
php_value upload_max_filesize 100M
php_value max_execution_time 800
php_value post_max_size 100M
php_value max_input_time 100
php_value memory_limit 120M
This should give you a max file size of 100mb.