Can't get past the 2MB upload limit with .htaccess or php.ini

I'm using MediaTemple grid server as a host. I tried to alter my php.ini file but got fatal memory errors, so instead I am using the .htaccess file to bump up the upload limit, like so:

# bump up upload limit for audio files
php_value upload_max_filesize 30M
php_value post_max_size 30M

The audio settings page then says I have an upload limit of 15MB - even though I set it to 30, this is no doubt due to MT own limits that cannot be passed. That's fine though, 15MB would be more than enough.

At any rate, this is not working. On the audio content submission pages the limit still says 2MB, and I cannot upload a file bigger than 2MB.

Has anyone dealt with this? Does anyone have the proper htaccess or php.ini code that they have tested to work ?