Firebird, não consigo conectar

[ordossi]

Olá pessoal estou tentando conectar uma maquina xp a um servidor ubuntu com firebird 2.5 classic, e aparece esse erro na hora que faço o teste pelo IBExpert, alguém pode me ajudar com isso?

Attempting to connect to:
192.168.1.19:/home/crp/crp.fdb

Connecting... Failed!
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Unsuccessful execution caused by a system error that precludes successful execution of subsequent statements.
Unable to complete network request to host "192.168.1.19".
Failed to establish a connection.

Attempting to connect to services manager... Failed!
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Unsuccessful execution caused by a system error that precludes successful execution of subsequent statements.
Unable to complete network request to host "192.168.1.19".
Failed to establish a connection.

Disconnecting from database... Passed!