Sumproduct

Hello.

I have the following formula:

=SUMPRODUCT(('Retailer1!$K$2:$K$2263=CONCATENATE(A5,"LY"))*('Retailer1'!$L$2:$L$2263<>0))

And I want it to give me the number of times the number changes from 0 to a rather than counting all the values higher than 0.

Can anyone helpme?