Perm denied, help

My perm got denied. The reason is: expiration date for PWD(Prewailing wage) is either less than 90 days or more than one year. What does it mean?
I got the PWD at 10/15/2005 which states it's valid at least 90 days but not more than 1 year. job order placed on 9/1/2005, two sunday newspaper at 9/4/2005 and 9/11/2005 and other ads on the sepetember 2005. The perm was filed on the 12/9/2005. Then we waited long time. We didn't receive any confirmation email. I don't understand deny reason. Does it mean we can file perm after 90 days of getting PWD? but it doesn't make sense. Anybody can explain it.
by the way if I refile the priority date will be the date of refile? That will delay my priority date another 8 month since I have to redo the advertisment.