Error while creating table EDISEGMENT entry

I need a help on BW 3.5 extraction.

When I try to look at (Change or Schedule) the InfoPackage of DataSource 0BILL_TYPE_TEXT I get this message:

"Transfer structure is not yet active".

Then I try to activate 0BILL_TYPE InfoSource and get this message:

"Error while creating table 'EDISEGMENT' entry '/BIC/CIBA0BILL_TYPE_TEXT' ".

I check EDISEGMENT table ("IDoc Development: IDoc Segment") and the entry indeed exists. The Responsible is a normal user, not "SAP".

I'd appreciate a helpfull answer.

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