Keeping or Saving a check box in agentry

Hi;

I am working on customising Work Manager 6.0 on Agentry Editor 6.1.3. I have a list of personnel on the left side of the screen and on the right hand side, I have a check box that shows for every personnel selected on the left side. Somehow when I tick this check box and move on to select another personnel, when I return to the previous one that I had checked, the check is gone and the check box is empty again. What steps do I have to do/undertake so as to retain this check box tick even when I navigate/select another personnel with their own tickbox?

Your help is very much appreciated!

Thanks and Regards;

Sizo Ndlovu