July 27/06

I am doing an import, with Sale Start Dates, and End Dates. I am choosing these fields in the default area, and so the date itself is coming right from the Adagio program. However, when I click the import button, I receive the following error message:
Invalid Data '07/27/2006" for Field called 'Sale Start Date" of record 1
The import will not work. I deleted these default fields, and imported, and it worked fine, however, I then have to manually change all the dates using the edit button in the actual data, which is cumbersome, to say the least. This default field has worked before, quite beautifully. Any ideas??
Thank you.