问FreeTDS错误:传入表数据流(TDS)远程过程调用(RPC)协议流不正确

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# Define a connection to the MSSQL server.
# The Description can be whatever we want it to be.
# The Driver value must match what we have defined in /etc/odbcinst.ini
# The Database name must be the name of the database this connection will connect to.
# The ServerName is the name we defined in /etc/freetds/freetds.conf
# The TDS_Version should match what we defined in /etc/freetds/freetds.conf
[ebe]
Description             = MSSQL Server
Driver                  = freetds
Database                = my_database
ServerName              = my_server_name
TDS_Version             = 8.0

# Define where to find the driver for the Free TDS connections.
[freetds]
Description     = MS SQL database access with Free TDS
Driver          = /usr/lib/i386-linux-gnu/odbc/libtdsodbc.so
Setup           = /usr/lib/i386-linux-gnu/odbc/libtdsS.so
UsageCount      = 1

# Change the "no" to "yes" to enable ODBC logging.
[ODBC]
Trace           = no
TraceFile       = /tmp/odbc.log

[global]
        # If you get out-of-memory errors, it may mean that your client
        # is trying to allocate a huge buffer for a TEXT field.  
        # Try setting 'text size' to a more reasonable limit 
        text size = 64512

# Define a connection to the MSSQL server.
[my_server_name]
    host = my_server_domain_or_ip
    port = 1433
    tds version = 8.0

$this->db_connection = new PDO("dblib:dbname=my_database;host=my_server_domain_or_ip", 'username', 'password');