What's wrong with my sprinting logic?

it seems like my 'down' boolean isn't updating, any help plz?

Here is my code:

     public void sprintManager()
     {
         if(needsSprint)
         {
             if(down)
             {
                 CurrentWeapon.WeaponTransform.animation[CurrentWeapon.sprintLoopAnim].speed = 0.5f;
                 CurrentWeapon.WeaponTransform.animation.CrossFade(CurrentWeapon.sprintLoopAnim,0.2f);
             }
             else
                 down_to_sprint();
         }
         else
         {
             up_from_sprint();    
         }
     }
     
     void down_to_sprint()
     {
         CurrentWeapon.WeaponTransform.animation[CurrentWeapon.sprintInAnim].speed = 0.5f;
         CurrentWeapon.WeaponTransform.animation.CrossFade(CurrentWeapon.sprintInAnim,0.2f);
         if(animation_finished(CurrentWeapon.WeaponTransform.animation[CurrentWeapon.sprintInAnim].name))
             down = true;
     }
     
     void up_from_sprint()
     {
         if(down)
         {
             CurrentWeapon.WeaponTransform.animation[CurrentWeapon.sprintOutAnim].speed = 0.5f;
             CurrentWeapon.WeaponTransform.animation.CrossFade(CurrentWeapon.sprintOutAnim,0.2f);
             if(animation_finished(CurrentWeapon.WeaponTransform.animation[CurrentWeapon.sprintOutAnim].name))
             {
                 down = false;
                 force_idle();
             }
         }
     }
     
     public bool animation_finished(string anim)
     {
         if(CurrentWeapon.WeaponTransform.animation.IsPlaying(anim) || CurrentWeapon.WeaponTransform.animation[anim].normalizedTime >= 1 )
             return true;
         else
             return false;
     }