I tried to use magic lamp for mission, but dont working. Every time i hit the button for magic lamp, i had crossbow. I tried to edit keyboard buttons, but still didn´t working. Nothing important , it´s just the quest but i want to finish it...

Did you select the lamp as active item?

You can do that with "tab", same way you can select the active sign. Just select the lamp instead of the crossbow.

It works now, thanks