FT5206 capacity touch problem

I'm using a display with FT5206 capacity touch panel, but I'm having some problems. The first time I connected the display, it worked correctly. Then I disconnected and reconnected it again and now the touch panel doesn't work. The problem is that, when the display is not touched, the interrupt pin value is 1.3V (instead of 3.3V) and this value doesn't change when the display is touched. Maybe I need to reset something? Can anyone help me?