>Hi, Alexander!
>
>I forgot CursorLocation, as well CursorType, which must be a Dynamic Cursor.
>
>Thank you!

For adLockPessimistic the CursorLocation has to be server-side (as mentioned in the other reply). Also, the provider may not support the pessimistic setting, check it with the Supports method of the recordset object or by verifying the locktype after opening the RS.