Cannot import slides

I've been working on a new project, and I have to import files from one storyline into another storyline (.story) file. no matter how many times I've tried, and on different slides, I am unable to import slides from another SL file - it produces a new scene that is blank. Today I tried creating the new scene first, and adding a blank slide and then do the import, but got the same results, now with a new scene and the original blank slide. This is a major issue, and looking at the history of other related discussions, it's not new. Note: I also updated my SL project file, and attempted to insert new slide from a .storytemplate. this slide also would not import.