Try mode, step-by-step won't load

Hello, 

I have been trying to insert a recording I have done simulation some software. This has been recorded and saved within SL 360. When I go to Slides>Record Screen and try to insert the video from the library I cannot get the Try mode to work if I want the step-by-step option. It looks like it is loading but then never appears in the file (see pic).

I can get it to load on a single screen or as test mode but just not the try option that I really need. Is this a known bug or is there any way to get around this? 

I have an urgent job to get out today that I need this tool for :( Otherwise it is going to have to be mocked up using a LOT of screenshots and triggers. Eek

Thank you, 

H