Force update with Conditional panel

I am using a conditional panel where two dropdowns get initiated when I go to a particular tab. I am also using a download page where the download wont work until i got to this conditional panel. How can I force update it so that the two drop downs will show only in that particular tab but when using download they should work. Thank you.

     condition = "input.tabBox_next_previous  == 'Product Use'",