UDF disappeared after upgrade to v9

SOLVED
Hello,
I had designed BIC reports pulling data from UDFs in Invoices.
After the upgrade, my reports are not working anymore as they can't find the udf fields in the InvNum.
I saw a document which states that the UDF fields remains in the InvNum. Mine has just disappeared although i do see them in the views.
Do i need to redesign the container or is there a way to get it in the InvNum table itself and get it running on its own?
Please help!
Thanks