Problem with identity_insert to insert data

Dear all,

I need to insert some datas in ms sql target table.

In BODS, I got an error message : 'Not possible to insert explicit value ...when IDENTITY_INSERT = OFF'

But I have already put IDENTITY_INSERT ON on the related table a lot of time.

When I see the sql loader trace insert, the insert request is exactly the same as when I do myself the request directly in the target database.

The user of the database connexion BO is the same than the target database.

Is there something special to configure in BO to insert some datas in ms sql target table ?

Best regards,

Mike.