Problem copying content from one site to my "main" site

Why can I not copy content from one site in my network to my "main" site?
Have checked your changelog.txt and it says that 2014-02-24 this was added to version 1.1 and I have downloaded the plugin today and have 1.2.1.

I've no problem copying content from my "main" site to other sites in the network though..

Best regards