Costing Enabled Flag

Hi

We have the item R00012. This item at Organization level is not properly defined. The costing Enable flag was not checked when they created the item. There is some transactions that were made against this item. Now we need to put the flag ON. If I try to set it ON, I get the message:

APP-INV-05507: You cannot update this field when:

   - On-Hand quantity Exist

   - Pending Transactions Exist

   - Uncosted Transactions Exist

There was 4 item in inventory. So I made a Misc Transaction - Account Issue to remove the quantity on hand. Now there is no On-Hand Quantity, there is no pending Transactions, but I'm still getting the message.