Add sumifs R1C1 formula to cell error !

Hi

I am trying to add this formula to a cell but gets Runtime error 1004 does
anyone know whats wrong with it ?

Range("AD4").FormulaR1C1 = "=SUMIFS(R[-2]C[-25]:R[100]C[-25];R[-2]C[-29]:R[100]C[-29];RC[-2];R[-2]C[-26]:R[100]C[-26];R[-1]C)"

Best regards

Petter