problems with parent page selection with post field.

Hi.

I have some problems with post field for selecting parent page.

I want to add pages with parent page selection via metabox ui like described here:
If parent settings is set to true, this field doesn’t save any data. Instead, it sets the selected post as the parent for the current being edited post.

Problems are.

1- It doesnt work in front end with front end extension form.
2- In backend it works for adding new pages but field does not autoload parent page vaule when i try edit the page. I have to select the parent page everytime when i try to update an existing page.

Can we fix these with some how?

Thanks.