AND in formula in conditional formatting not working

[Hudco]

Good Evening everyone,
I have two cells, lets say G10 and H10, with a formula (say =G4-(SUM(G6:G9) ) and the second cell is exactly the same formula but referencing the next column.

Then in cell F10 I have a formula generating text based on the results of G10 and H10. All these formula are working correctly. But I have set a conditional format to apply to F10 such that if G10 AND H10 are zero then the text in F10 is to be red and bolded. The conditional Format formula is ="AND(G10=0,H10=0)" but when G10 and H10 are zero the text colour does not change.

Can anyone shed some light on what might be wrong.

Thanks.

 

[Fluff]

Does your CF formula include the quotes?
If so remove them