go-mssqldb运行报错

<iframe style="border:1px solid" src="https://wide.b3log.org/playground/29027e1c4ff4d546c6368e9f65cd6c87.go?embed=true" width="99%" height="600"></iframe> 每次执行到db.Ping()都返回： Login error: read tcp 10.1.8.159:5902->192.168.7.209:1433: wsarecv: An existing connection was forcibly closed by the remote host 调试看源码看的不是太懂，大侠指教