Downgrade php 5.4 to 5.3

Hi, I have a AWS instance "Drupal powered by Bitnami". I've tried several times to remove php 5.4 and install 5.3 but php -v always shows PHP 5.4.10 (cli) (built: Dec 24 2012 09:03:53) .

This is what I did: sudo apt-get remove php5-cli php5 php5-common sudo apt-get install php5 php5-mysql php5-curl