Lectora Pro 2005 Crashes

Morning!The problem - I had 6 competencies that each had a True/False answer which then directed user to the relevant page and then to an informal test.I had used one radio button group with 12 radio buttons. Have now altered this so that each competency had it's own radio button group with 2 radio buttons. So far so good!However, I still cannot use anything on the arrow bar at foot of screen as as soon as I start to draw the 'box' Lectora crashes.Thanks for your support on this - much appreciated while in this 'learning' mode!regardsKrys