I have a lot of work so i though I extend my both computers now. The date is 09-09-2011. I have a key/dvd from a shop (paid) and at the bottom of > Verlenging (Dutch) is extension is to extend the product but Symantec stole over 34 days. This on my XP computer. Input key output is 366 days and it has to be 400 days. What can I do?