Widgetkit - strange problem

I use Joomla 3.3.6, when i install widgetkit from yootheme to produce slideset effect, the component say "install sucess" but does not appear in the components... and even more strange version of joomla is now 3.3.4 (passes from 3.3.6 to 3.3.4) i updtaed joomla and is now 3.3.6 again...

The module Widgetkit is installed, but gives error...

how can I solve the problem to install correctly?

Thanks for your help

Hi,
there is one "small" problem, Widgetkit a product of our competition, so we don't support it.
Ask YT developer especially if you'd using a pro version.