problem with importing DB in consolidation(closing date)

Dear All,

I set up the Group mandant in Navision(they did not had it before, I am new here), and I started to load in the companies. They did close the income statement in the years, hence they have the entries with C31.12.06. When I try to import it(both beginning and ending date is C31.12.06), the testing shows no problem, but then I receive an error message:

“You cannot use a closing date in date calculations”

WHat could be the problem?

Any help would be highly appreciated!!!

Thanks a lot