Antonio,
I just did the same thing and had no trouble with my grid/combos. Check the properties to see if it is the active control for that column and that it is enabled. Also, is it being populated correctly? An empty combo box won't 'drop down' and looks like it isn't working.

HTH
Barbara

>I have one form that was developed in VFP 30 and this form has one grid with a combobox inside. After I migrating it to VFP 60 the combobox inside the grid does not open.
>
>Does anybody could help ?