All the invoice are unpaid

[Tusanim]

I have a problem with with the invoices ,ever since i started the multilocation evaluation on january 2012 all the previous invoices turned to be unpaid and all off my debtors appears not to have made any payments at all , i thought it was because of a demo, untill i purchased the 3Multilocation licence the problem persisted but all the transactions that i processed after multilocation are fine

Please assist on this matter