My Joomla keeps saying PHP 5.3.10 but I need higher version :(

[JTCB]

Hi!

So I changed (days ago) the version of PHP in my AlterVista panel to 5.6
Also checked advanced tab it says:

# # av:php5-engine
AddHandler av-php56 .php

STILL...
When I log into my joomla admin panel, it says I am still on 5.3.10!
What to do?

I need higher version to update a plugin and keep getting error:

Error
This extension is not compatible with PHP 5.3.10. You need PHP 5.3.13 or higher to be able to install and use this extension.

[JTCB]

OK. I found out what's the problem, had to change PHP inside the htaccess INSIDE the Joomla directory! Sorry for bothering