装完freetds后连接sqlserver总是报错，请帮忙看看

64139303

[root@ns etc]# tsql -S sql  -H 192.168.90.26 -p 1433 -U sa -P sa
locale is "C"
locale charset is "ANSI_X3.4-1968"
Msg 20009, Level 9, State 0, Server OpenClient, Line 0
Server is unavailable or does not exist.
There was a problem connecting to the server


配置文件：只改了这里
[sql]
        host = 192.168.90.26
        port = 1433
        tds version = 8.0

64139303

晕死，没有人知道吗，。。。