Table query always returns an error on mssql2000/2005

[myuid]

package main

import (
"database/sql"
"flag"
"fmt"
"log"
_ "github.com/mattn/go-adodb"
_ "runtime/cgo"
)

var (
isLocalAuth bool
isMssql2000 bool
remoteServerIP string
instance string
)

func init() {
flag.BoolVar(&isLocalAuth, "local", false, "true windows，false sa.")
flag.BoolVar(&isMssql2000, "mssql2000", false, "is it MSSQL2000?")
flag.StringVar(&remoteServerIP, "ip", "192.168.1.87", "set server remote ip.")
flag.StringVar(&instance, "instance", "MSSQLSERVER", "set instance.")
}

type Mssql struct {
*sql.DB
dataSource string
database string
windows bool
sa *SA
}

type SA struct {
user string
password string
port int
}

func NewMssql() *Mssql {
mssql := new(Mssql)
source := "localhost"
if !isLocalAuth {
if instance == "MSSQLSERVER" {
source = fmt.Sprintf("%s", remoteServerIP)
} else {
source = fmt.Sprintf("%s\%s", remoteServerIP, instance)
}
}
mssql = &Mssql{
dataSource: source,
database: "suilang",
windows: isLocalAuth,
sa: &SA {
user: "sa",
password: "lcs6718",
port: 1433,
},
}

return mssql

}

func (ms *Mssql) Open() error {
config := fmt.Sprintf("Provider=SQLOLEDB;Initial Catalog=%s;Data Source=%s", ms.database, ms.dataSource)
if ms.windows {
config = fmt.Sprintf("%s;Integrated Security=SSPI", config)
} else {
if isMssql2000 {
config = fmt.Sprintf("%s,%d;user id=%s;password=%s", config, ms.sa.port, ms.sa.user, ms.sa.password)
} else {
config = fmt.Sprintf("%s;user id=%s;password=%s", config, ms.sa.user, ms.sa.password)
}
}

var err error
ms.DB, err = sql.Open("adodb", config)
fmt.Println(config)
return err

}

func (ms *Mssql) Select() {
rows, err := ms.Query("select * from users")
if err != nil {
fmt.Println("select error:")
log.Fatal(err)
}
defer rows.Close()
for rows.Next() {
var uid, name string
if err := rows.Scan(&uid, &name); err != nil {
log.Fatal(err)
fmt.Println("columns error.")
}
log.Printf("uid %s name is %s\n", uid, name)
}
}

func main() {
flag.Parse()
mssql := NewMssql()
defer mssql.Close()
err := mssql.Open()
if err != nil {
fmt.Println("sql open error: ", err)
return
}
mssql.Select()
}

Running the above code on mssql2000 and 2005 always returns an error when querying data, just like
select error:
2019/03/30 22:48:09
exit status 1

go version go1.11.5 linux/amd64