multiple conditions counting

Hi,
Humbly requesting assistance. I am not able to derive the function that I need to count the total number of cases where both conditions are true.

I am trying to count the number cells that meet two conditions.
basically if the value "1" exists in column K, and the corresponding cell in column F also contains the value then count it.

Not sure if this is a COUNTIFS() function or a SUMPRODUCT() function.
Have tried multiple, but no glory as of yet.

Here's what I have: =SUMPRODUCT((K5:K221="1")*(F5:F221="1"))

I'm getting zero with that function. What I expected is that when column K5 is true and column F5 is true the count is incremented by 1. And it would count through row 221.

Thanks in advance!
Tony