Photoshop - Fill pattern script (all pattern turn black)

hi, new to photoshop, learning how to fill a pattern on a doc.

I made a pattern with a PINK heart. but after I filled it, it becomes all black. how come?

tried different patterns and different scripts (brick wall, symmetry, random etc.), even the window of setting up the spacing, scale etc.....the prevew and the final result - they all become black.

no problem when I use "new fill layer" function (the color is right but they all line up in the same row) but I want to use the scripts as there are more variations.

Did I do anything wrong? thanks for your help.