Hello Wolliballa,
Please follow the below steps,
1.Edit the device info.
2.Get in to variations by click the last tab 'Variations' and click on 'Use Variations>>'.
3.Click on 'Full Prompts' and set as I have attached(CSB-Variations.png).
4.Save the details and run the activity. Still have issues post me the debug log.
Note:
If you are not having 'Attach' menu just try using 'Advanced Editor' option.
Thanks,
Nanda