ADS矢量信号建立的报错问题

最后接了一个agilent 的E4438 ，然后就是下面的报错
Caught server exception:Connection
refused to host: local host:4790
check the server is running on localhost
or set a valid server using the Server -> Set Server menu selection
If the server si running on Windows XP service Pack2.
make sure that the program MsmSrvr.exe is not bocked by the firewall.
查了端口号，4790上没有程序运行。也没开防火墙，该怎么解决?

把杀毒软件也关了看看