Task Pane not working

So the thing is Task Panel (on the right) of a SolidWorks 2015 is not working. I can see it, i can expand it, but when i click on some features (let's say "New document") it doesn't do anything.

It's pretty weird because i can do it from the upper panel.

Another thing (not sure if it's related to the same issue) is its language: whenever i set it on another language, the not-working-features of the task pane stay on English, while only a few (the working ones) change.

My PC is pretty good actually if anyone asks.

I would greatly appreciate some help.

Thanks to all,

Pablo D.

SolidworksUser Interface