rz命令用不了？

服务器跑的是centos，已经反复安装了几次lrzsz， 但是输入rz命令没有出现本地窗口，而是打印出waiting to receive.和一串不明其意的字符，为什么呢？

[root@iZ28dqmn6k8Z ~]# yum  list   installed   lrzsz
Loaded plugins: security
Repository base is listed more than once in the configuration
Repository updates is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
Repository contrib is listed more than once in the configuration
atomic                                                   | 2.2 kB     00:00     
atomic/primary_db                                        | 810 kB     00:54     
base                                                     | 1.1 kB     00:00     
epel                                                     | 3.6 kB     00:00     
epel/primary_db                                          | 2.5 MB     00:02     
extras                                                   | 2.1 kB     00:00     
updates                                                  | 1.9 kB     00:00     
updates/primary_db                                       | 609 kB     00:00     
Installed Packages
lrzsz.i386                        0.12.20-22.1                         installed
[root@iZ28dqmn6k8Z ~]# rz
�**B0100000023be50e.**B0100000023be50