Protocol Confusion of freeTDS jdbc driver, please help!

Question

I use freeTDS jdbc driver to connect to MS SQL 2000. In my programme, firstly I need to select sth out, and base on this update the other field in the same table. TOC will like that
Statement stmt1 = conn.createStatement();
ResultSet rs1 = stmt1.executeQuery("select sth from table");
stmt1.executeUpdate("update table set field1 = 'xxx'");
exception throw: java.sql.SQLException: Protocol confusion. Got a 0x79 packet
I checked from the source of TDS driver, this exception throws when the sql query output is not a resultset.
These 2 querys are prefectly okay individually, I tried to reverse the order, doesn't work neither. Even I disconnect the DB Connection and reconnect it before running the 2nd query, it won't help.
Please help!

Answer 1

I haven't used freetds, but seems like defaul version is 5.0. Try it with 7.0 and see it works better. By the way, JDBC driver's readme says that it was only tested with MSSQL 6.5 and 7.0.
---- FAQ from freetds.org ----
Do I need to configure anything?
When you untar the package you will need to run:
$ ./configure
You also have the following options you can add to the configure statement:
--with-tdsver=VERSION
specify the TDS version to use
(4.2, 4.6, 5.0, or 7.0) [default is 5.0].
--enable-msdblib
enable Microsoft APIs and behaviour for DBLib
--enable-dbmfix
rename dbopen() to tdsdbopen() as a work around for dbm name conflict
--with-gnu-ld
assume the C compiler uses GNU ld [default=no]
--enable-shared
build shared libraries [default=yes]
--enable-static
build static libraries [default=yes]
IMPORTANT You must build with TDS version 4.2 to access a MSSQL server or Sybase prior to 10.0! TDS 7.0 may also be used to talk to MS SQL 7 and above.