You gotta tell us what you mean by "not allowing". At what point did Excel
balk? For example, does the Controls Toolbox no longer show up in your list
of toolbars? Does the mouse jump away when you try to click on the combo-box
icon in the Controls Toolbox? Does it let you create a new combo box but
nothing happens when you try to exit Design Mode? What? And is Excel
displaying an error message? If so, what exactly does it say?

--- "mcbuttah" wrote:
I've recently added a combo box to a worksheet for the use of auto complete
in drop-down lists. I've now added another column that has the same
properties, but I'm trying to add another combo box with the same properties
as the other one and it's not allowing me to, what can I do?