新装ORACLE无法访问通过tnsnames配置的另一台集群oracle服务器

在一台linux系统刚装了oracle10g，通过tnsnames配置了如下的地址，无法访问，（PS: 该配置确定没问题，从正常的主机上复制过来的，同时，通过拆分该集群oracle来访问其中一台，却可以访问）
aadb =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.3.98)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.3.99)(PORT = 1521))
(LOAD_BALANCE = yes)
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = aadb)
)
)

(如下：拆开可以使用。。。。。。)
aadb1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.3.98)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = aadb)
)
)
，oracle是刚安装的

哪位热心的帅哥美女，帮忙分析下呗

没有配置监听。。。。