How to make a movie clip invisible depending on a value in another layer?

Question

I am trying to make an "achievements" page for my game, where if the user has a high score greater than 100, then the achievement can be unlocked. I tried using a code like this, but it didn't seem to work!
function Check();
if(endscreen_mc.highscore_txt > 100)
medals.roachLock.visible = false;
else if(endscreen_mc.highscore_txt < 100)
medals.roachLock.visible = true;
else if(endscreen_mc.visible == 100)
medals.roachLock.visible = true;
The high score value is saved inside a shared object. What's wrong with my code, and what can I do to fix it?

Answer 1

I tried doing this, but it's still not working.. 
function Check():void
if(Number(endscreen_mc.highscore_txt.text) > 100)
medals_mc.roachLock.visible = false;
medals_mc.medal_mc.visible = true;
else if(Number(endscreen_mc.highscore_txt.text) <= 100)
    medals.roachLock.visible = true;
This is what's inside my endscreen layer
function showresults():void
          Rchannel.stop();
   // display current score
   endscreen_mc.scoreR_txt.text = String(score);
   // calculate, display and save (if necessary) a new highscore
   var so:SharedObject = SharedObject.getLocal("alltimeHighScore");
   if (!so.data.score || score > so.data.score)
       endscreen_mc.highscore_txt.text = String(score);
       so.data.score = score;
       so.flush();
             Check();
   else
       endscreen_mc.highscore_txt.text = String(so.data.score);
   if(so.data.score==score)
                    endscreen_mc.score_txt.text = String(score);
                    endscreen_mc.highscore_txt.text = String(score);