I am trying to develop some relationships between dimensions on the same sketch.  I have done this countless times in the past and never had any problems.  However, as of lately when I click on tools>equations or right click on the equations folder in my design tree and then click "manage euqations" something goes wrong.  My main solidworks window acts as if the dialogue box has opened because it grays out (when a window becomes "background") and I lose all functionality with it until I hit escape (exactly as if the dialogue box had opened).  This tells me that the equation manager dialogue box is opened up but I just cannot see it.  It's as if solidworks thinks the box is open and reacts but there is no box in which to add/edit equations.  Likewise, I can write in equations directly into the dimension and the equations folder will add them in the design tree.  However, with no actual dialogue box that opens it is very difficult to manage/delete them as I need.  I should also note that this effects all part numbers and not a single drawing.  Is this a glitch local to my computer/software or is there something I am missing that can easily be fixed.