Oscilloscope Puzzle Bug?

I'm on my third play through to see the Ariel ending and just as in the 2nd play through to get the Chelsee ending, the won't permit me to solve the first Oscilloscope puzzle. After the pop up box that gives the instructions and Tex's voice over when I right click on the mouse the only choices are 'pause', 'skip the puzzle', or the 'back arrow' which just does the voice over again. On the 2nd play through it did let me solve the second Oscilloscope puzzle. Has anyone else had this problem?

IGNORE THIS POST: I figured out this was just the clue for later in the game.