With help I have now got as far as SQL login but seem to be unable to connect to the sample database. Keep getting connection failures.Anyone help please?

Johns-iMac:~ johnpayton$ export FIREBIRD_HOME=/Library/Frameworks/Firebird.framework/Resources

Johns-iMac:~ johnpayton$ export PATH=$PATH:$FIREBIRD_HOME/bin

Johns-iMac:~ johnpayton$ isql

Use CONNECT or CREATE DATABASE to specify a database

SQL>isql localhost:/library/Frameworks/Firebird.framework/Resources/examples/employee.fdb;

Use CONNECT or CREATE DATABASE to specify a database

SQL> CONNECT "/Library/Frameworks/Firebird/framework/resources/examples/empbuild/employee.fdb"  user SYSDBA password 'masterkey';

Statement failed, SQLSTATE = 08006

Unable to complete network request to host "localhost".

-Failed to establish a connection.