Problem with activation of Plugins

Hi,
I’ve been having a problem with Plugins activation for a few weeks now.
The problem is that when in the Plugins section I click on the “Activate” link the plugin does not activate. I have to tick inside checkbox on the left side of the Plugin and then Bulk actions and then “Activate”. That’s how it works.

There is also the problem that when I update a Plugin, the Plugin is automatically deactivated and each time I have to reactivate it.

Could you please help me solve this problem?
Thanks