plainly said, an impossible thing is happening with a few simple stored procedures in FB 2.1 .

I asked for paid help at
http://www.vworker.com/RentACoder/misc/BidRequests/ShowBidRequest.asp?lngBidRequestId=1824928

If you want to help for free, you can download db and explanations from this link
http://www.sendspace.com/file/y81xsn
...and I will owe you a beer :)

Thank you

Peppe