1. Yes, it should be like that, as there are other systems where the configuration is like that and the task works perfectly. I will change to see what happens

2.Yes, same as above. Although, I will change it too 

3. That is because through the Task Schedule tool I manually executed the task after son changes. 

Hello Vitaliy, as I said to Yaron, I've granted to the user all kind of rights but it continues like that. I've also change user to Administrator but nothing has changed. It seems it is also not related with the user who runs the task.

I've granted to the user all kind of rights but it continues like that. I've also change user to Administrator but nothing has changed. It seems it is also not related with the user who runs the task.