Fatal NI connect error 12500, connecting to:
 (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=server.domain.com)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=test)(CID=(PROGRAM=sqlplus)(HOST=server.domain.com)(USER=oracle))))

  VERSION INFORMATION:
        TNS for Linux: Version 9.2.0.7.0 - Production
        TCP/IP NT Protocol Adapter for Linux: Version 9.2.0.7.0 - Production
  Time: 16-OCT-2007 13:04:41
  Tracing not turned on.
  Tns error struct:
    ns main err code: 12564
    TNS-12564: TNS:connection refused
    ns secondary err code: 0
    nt main err code: 0
    nt secondary err code: 0
    nt OS err code: 0