At 01:07 PM 9/06/2009, you wrote:

>1. I am using Windows Vista Business
>2. I install Firebird 1.5.5 running as service
>3. I stop Firebird 1.5.5 service
>4. I edit firebird.conf in privilege mode to avoid VirtualStore problem
>5. I add "IpcName = global\FirebirdIPI" to firebird.conf
>6. I save Firebird.conf and start Firebird 1.5.5 service again
>7. I logon to an "limited user" account and access a firebird database using local protocol. I still get "unavailable database" using local protocol
>
>If I start my firebird in application mode (e.g: fbserver -a), I manage to access my firebird database using local protocol.

Are you certain that *service* you installed is fbserver.exe? Have you looked at the Properties of the Firebird service, to see which executable it is running?

./hb