1- As of version 1.6 you can create containers through the deployment executable. I find this much easier to use than the variable editor. Also as a side note I manage variables through a text editor rather than the variable editor. However this is a digression.
2. The issue is being caused by permissions. I have seen this caused when
* the windows folder permissions do not allow full access so check this.
* however more likely is that you need to set the security permissions as per this link: