why doesn’t the export dialog box in outlook 2011 allow me to complete an export?

I am trying to export my Outlook 2011 information to another computer and the export function simply does not work or I am too dumb to understand how to use it; before I can export, I have to respond to a drop down box and either cancel  or save; no matter which selection I make, it cancels the export; there is also no selection to export my mail folders..