Problemas com JDBS + Firebird

String driver_jdbc = “org.firebirdsql.jdbc.FBDriver”;

String url_db = “jdbc:firebirdsql:localhost/3050:/opt/interbase/database/firebird.fdb”;

String user_db     = "sysdba"

String passwd_db   = “masterkey”;

try {

Class.forName(driver_jdbc).newInstance();

connection = DriverManager.getConnection(url_db, user_db, passwd_db);

catch (Exception e) {

e.printStackTrace();

System.out.println(“Erro ao realizar conexão com o SGBD.”);

} //fim catch

}

Exception in thread “main” java.lang.NoClassDefFoundError: javax/resource/ResourceException

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Class.java:141)

at SGBD.SGBDConect(SGBD.java:119)

at ExecuteSGBD.main(ExecuteSGBD.java:51)