Calculating the result

Hi,
I am doing this bit of drop target in flash mx2004.
The problem is my ‘all wrong’ field is working where as ‘all correct’ is not working.
and can any one please tell me how to write the code for calculating the results like total correct,total wrong and the percentage of correct out of total.
Any linkl to such type of tutorial will be of great help.
Check my flash file to read the code so far: