Replicating Conditional Formating Formula

Hi Everyone,

Hope you can help ...

I have set a cond. format to change the fill of B10:H10 (=$B$10="Behind Schedule") based on the value of B10. Complete turns the cells green etc.

I now want to replicate this down to the below cells but when I do this either by replicating or format painter it is still taking the condition from B10 as opposed to the new row number/cell ID. B11, B12 etc.

How can I do this?

Example attached ...

Many thanks,

Ewan