At 09:02 PM 23/01/2009, you wrote:

>Hello Thomas,
>
>I checked those properties, and they seems correct to me.

Open the DFM as text and copy all of the connection properties. Paste them back to the list.

>I have tested my application:
> Under Firebird 1.5.5 it works
> Under Firebird 2.1.1 it works
> Under Firebird 2.1.2 RC1 it don't works

2.1.2 has restricted the DPB properties that can be set by ordinary users. Some are allowed to be set only by SYSDBA or the owner now. It's important that you check what might have been set there, that is now forbidden to the ordinary user. If all seems "legal" for the ordinary user then we might be looking at a small change needed in how IBO defaults the connection attributes to the API for properties like ForcedWrites, ReservePageSpace, SweepInterval, perhaps DBKeyScope too....

Jason, are you reading this thread?

Helen