>I'm trying to get an server side ADO Recordset from an Oracle table with the LockType = adLockPessimistic, but it does not work. Can I not do this with Oracle?

What other settings are you trying? Some recordset options are incompatible with each other. When this happens, the provider just gives you a forward only, read only rs without giving an error message. Check the settings after the rs is open, and also check the Supports method of recordset to see if the provider supports the options you are trying to set.

Just as a guess, do you have permissions to request a lock on the result set you are requesting?