出现labix.org/v2/mgo错误远程服务器意外关闭了连接

I'm trying to run a main.go file Here , and it shows error

cannot find package "labix.org/v2/mgo" in any of:
    C:\Go\src\labix.org\v2\mgo (from $GOROOT)
    D:\MyFolder\go-in-5-minutes\episode5\src\labix.org\v2\mgo (from $GOPATH)
cannot find package "labix.org/v2/mgo/bson" in any of:
    C:\Go\src\labix.org\v2\mgo\bson (from $GOROOT)
    D:\MyFolder\go-in-5-minutes\episode5\src\labix.org\v2\mgo\bson (from $GOPATH)
exit status 1     Process exiting with code: 1

so I try to execute

D:\MyFolder\go-in-5-minutes\episode5\> go get labix.org/v2/mgo

But then I got this error:

cd .; bzr branch https://launchpad.net/mgo/v2 D:\MyFolder\go-i n-5-minutes\episode5\src\labix.org\v2\mgo bzr: ERROR: The remote server unexpectedly closed the connection. package labix.org/v2/mgo: exit status 3

How to solve this problem and get labix.org/v2/mgo ?

Currently I replace all the files using

import (
    "labix.org/v2/mgo"
    "labix.org/v2/mgo/bson"
)

with

import{
    "gopkg.in/mgo.v2"
    "gopkg.in/mgo.v2/bson"
}

and pass build and works!