Seem to be getting intermittent errors while trying to connect to my Oracle 10g database, installed on my laptop. both server and the TOAD client GUI run on the same machine. I have tweaked the tnsnames.ora and the listener.ora to either 127.0.0.1 or computerName and tried but no luck. Windows XP - is the Operating system. All services /are running as checked in the Services folder of the Control Panle in windows. Can anyone help me please . many thanks in advance.