Support package level not sufficient. ME21N

Hello,

we have installed IDES ECC 6.0 and when trying to create items in transaction ME21N, then I get a short dump, with the following message:

"Support package level not sufficient. See note 1600482."

In this note, it is stated that "These changes are already included in Business Suite 2011 and in SP26 of the SAP AP 7.00 software component." and as I checked in transaction SPAM we have SP26, AP 7.00.

Can you please tell me how to overcome this issue? What exactly should be done? In note 1600482 there are no clear actions mentioned as solution.

Thanks