Inserted Engage file as Web Object, but larger than Storyline play

I inserted published Engage files as Web Objects, changing the published interaction.html file to index.html. When I publish Storyline, the Engage files are too large - images are cut off and the user must scroll not only up but side to side. What is the solution?

-'Display at user's current browser size' is selected from the Browser size and 'Lock player at optimal size' are selected in the Player Properties of the Engage Player prior to publishing the files. Thanks in advance