I have 2 mongo instance running in 2 different servers (one primary and other secondary); I am able to retrieve a document from the primary server using this connection code:

```
var db = mongojs('user:pswd@localhost:27017/mydb?authSource=admin');

```

But when I try to retrieve a document from the secondary server, I am getting the following error:

> 
> { [MongoError: not master and slaveOk=false]  
> 
>  name: 'MongoError',  
> 
>  message: 'not master and slaveOk=false',  
> 
>  ok: 0,  
> 
>  errmsg: 'not master and slaveOk=false',  
> 
>  code: 13435 }
> 
> 
> 

I also tried using the code:

```
var db = mongojs('user:pswd@localhost:27017/mydb?authSource=admin&slaveOk=true');

```

What am I missing?