Starting tutorial. When I drag label to screen it doesn't take/can't edit text

Very early programmer. Just got virtual machine running on my Windows and have OSX Mavericks and running the latest version of X-Code

3rd episode is just getting started. The teacher dragged the label tab from bottom right of x-code onto the main storyboard screen and was able to edit the text to create a hello world application.

I am dragging the label onto my storyboard...the green + arrow is showing when I have it over top the screen, but when I release the button it appears not to be taking. There is no object showing on that screen that can be edited. Why isn't my "label" taking on the screen so I can edit it and follow-along?

*****Update. I should say the label button gets added, but it is right beside the arrow that is on the left of the main storyboard screen. Can't drag it anywhere else.