I change the font color in a grid based in MyField value.

thisform.grdMyGrid.SetAll("DynamicForeColor",;
"IIF(MyTable.MyField = .T., RGB(128, 255, 255), RGB(0, 0, 0))",;
"Column")

It works fine, but now I have put a combo in the column (column3.combo1) , and deleted the text1 in column3.text1.
And now the color changes in the rest of the fields except the one that has the new combo.
Any idea why this is not working properly?
Thanks