How kaltura plugin is supposed to work in conjunction with Kaltura Client?!

i've correctly setup Kaltura Plugin with Drupal;
I need to add some features, but it seems ther's some kind of... compatibility issue, since kaltiraclientbase and kalturalient classes are already present [but with a version 0.7 instead of 3] ...
so: am i wrong or i should just stick to the older version of client api?