Image.Fillamount not working?

Hello im trying to make a visual Cooldown, but the command in the unity Api is not working.

This sets the counter cooldown. (which works, what doesn't work is the visual part)

Code (csharp):

1.  
2.      if (Time.time > PlayerNextCounter)
3.         {
4.                 PlayerNextCounter = Time.time + PlayerCounterCD;
5.                 PlayerCounterIMG.fillAmount = 1;
6.                 PlayerCounterIsInCD = true;
7. }
8.  

This is in update()

Code (csharp):

1.  
2.         if(PlayerCounterIsInCD == true)
3.         {
4.             PlayerCounterIMG.fillAmount -= 1.0f / PlayerCounterCD * Time.deltaTime;
5.         }
6.  

I followed the example, yet it is not working. The counterimg is a image of type Filled in radial 360.

Any ideas what is wrong here?

 

Looks like the formula is wrong.It should be something like

Code (CSharp):

1. fillAmout = (Time.time - cooldownStartTime) / cooldownDuration
2.