COOL Combobox PROBLEM

Hi there.

I have a small problem where I work, I have 2 combobox on a sheet. These combobox work fine when I`m using it on my Notebook, but when I have to show the document in a projector the combobox disappear.

These combobox show a list of items from another sheet and input some informations on it`s own sheet with the standard function INDEX, I guess the problem is somehow connectedto the resolution of the projector or something.

So, guessing won`t help me at all, I hope an Excel Forum will help me.

Note: when I press the (Fn)Function and CRT/LCD keys from the notebook the docs works fine, if I press it again to show the informations on the projector the combobox disappear and THE BOSS OF THE BOSS OF my boss gets really mad and thinks I`m stupid, thats somehow not cool.

If any of you experts needs any further informations about the combobox or the notebook properties, please let me know, I really need to get to the bottom of it.