variable help

Hi,I'm running Lectora, v.2007 (SP3). I'm having trouble, here's what I'm trying to do:I have an office-like layout--with objects around the the room users are to select. When each correct object is selected, they are rewarded with a star.I have a hidden continue button. I want the button to show when all objects have been selected and all stars are shown.I can't seem to figure out how to set variables to make the continue button show dependent upon the # of stars showing. I tried to modify the solution this forum user was given, but with no success: http://community.trivantis.com/forum_posts.asp?TID=4698undefined Value: 1; Set Variable ContentsI created another variable named: countstarsMouseclick: Action: Modify Variable; Target:countstars; Value: VAR(temp); Add to VariableI applied the two actions above to the 10 objects (which already have "modify variable" actions applied to them for changing a grey star to a gold star.I made an action for the continue button to show if the countstars variable was greater than 9 (there are 10 stars).I'm new to Lectora, and would appreciate some guidance.Thanks in advance,James