Can't add bar lines

I cannot add bar lines to the beginnings of staffs. They won't drag-and-drop nor will they double-click. I'm using Windows XP 32-bit.

Here's the scenario: I'm writing out a series of exercises. Each exercise is eight bars long and is stretched over two staffs of four measures each. I want a treble clef to appear at the beginning of the first four-bar staff, and I want a bar line to appear at the beginning of the next four-bar staff. That approach provides a good visual separation between the exercises.

While I haven't been able to delete the treble clefs every other line, I can make them invisible as a workaround. Now I just need to figure out a way to add the bar lines. I've tried everything, but so far nothing has worked.

I should mention that I created my document in MS 0.9.5. A little while ago, I downloaded the new 0.9.6 version on my laptop and tried editing my music file using it. I was able to add barlines where I want them using the new version, but it totally screws up the formatting of my document to the point where solving one problem creates a new, even less acceptable problem. So I'm going to have to find my solution, if there is one, using version 0.9.5.

Any advice?