Linear Slider using PSoC 4

I am using cy8c42445 . I want to implement 5 button + 1 linear slider having 5 linear pad. And behind linear slider there is 5 LEDs .i implement 5 button successfully and detect it also.In my application i am using linear slider for volume control using PWM.In my project LED behind slider is ON according to position of finger on slider . My problem is that slider is sensed very fast and all LEDs are ON by just touching on SLIDER. I did not find any solution. 

Any help will be Thankful