tsql Unable to connect: Adaptive Server is unavailable or does not exist

New to the list, getting this error from

tsql  -S SQLServer -U myusername -P mypassword

/usr/local/etc/odbcinst.ini:
[SQLServer]
Description             = FreeTDS SQL Server ODBC driver
Driver          =       /usr/local/lib/libtdsodbc.so
Setup           = /usr/local/lib/libtdsS.so
UsageCount              = 1

/home/lee/.odbc.ini:
[SQLServer]
Description             = SQL Server Test
Driver          = SQLServer
Server  = 192.168.1.100
Port            = 1433
Database                = mydatabase
User            = myusername
Password                = mypassword
TDS_version     = 7.0

/usr/local/etc/freetds.conf:
[SQLServer]
        host = 192.168.1.100
        port = 1433
        tds version = 7.0


I've checked library dependencies with ldd, everything seems in order.

I tried "telnet 192.168.1.100 1433" and got

Unable to connect to remote host: Connection refused

I will chase that error further, but there IS a SQL Server (10.0
Express) running on that port at that IP, with that port open, and the
SQL Server Browser service is running.

I found the Adaptive Server error on many other forums and have tried
their tips, to no avail.

I found Lukasz Szybalski's post with this error in the archives from
2/7/09, but didn't see any response/resolution.

The word "Adaptive" is curious -- does that mean it's trying to
connect to a Sybase SQL Server instead of a MS SQL Server?

Any other ideas?

Thanks in advance.
-- 
Lee