issue with PopUpManager.createPopUp

hi,

I have a code which use **PopUpManager.createPopUp** and it works well on Flex. I must turn it into Apache Royale.

On my index.mxml i have:
```

// Call the method

```
**popupChangePass** is another mxml with a form that should be displayed in the popup.

It compiles but it produces an error on the browser console:

```
Cannot read property 'parent' of null
```

the console.log("change pass 2") is not displayed so the **createPopUp** fail. The Flex version works so I guess the scope of **this** is different. And if i console **this**, it has no parent.
I'm not 100% sure because if **this** is the cause because the js code is obfuscated.

Did someone else used createPopUp before and face this problem before?

Start with the changePass() method in index.mxml and reproduce the browser-console error at PopUpManager.createPopUp(this, popupChangePass, true). Inspect the createPopUp entry point and popupChangePass usage to determine why the parent is null; done means the popup is created, the following console log appears, and the form displays.

Written by the indexing model from the issue text.