first time execute ph.createPage  , socket.io seems not prepared

first time I run 

```
ph.createPage(function(err,page){
   // no code run here 
});
```

it didn't work .
I need to execute like this 

```
setTimeout(function(){
    ph.createPage(function(err,page){
    });
},500);
I think 
```

phantom.create(function(error,ph){
});

```
callback executed but socket.io not prepared. 
```
