set visibility trough property not working

This is my first post.

if (condition) {
    trace("called");
    p[1].visible = false;
    j[1].visible = false;
}

With the code above "called" was printed in console but the both objects (buttons) still visible. Then when I try to put the set visibility (p[1].visible = false; and j[1].visible = false;) out from condition, it's work well.

How can I do set visibility with some condition?