Why JFrameForm Item Showing Up In My Internal Frame Form Page Netbeans

Question

Sorry The Pictures On This Link Idk How To Make Its Shows Up

Main Menu Photo Main Menu

Internal Frame Form Photo Intenal Form Opened

I Do Something Like This But Not Work Idk How To Do It Help Me??

private void siswaMouseClicked(java.awt.event.MouseEvent evt) {                                   
FormMurid Murid = new FormMurid();
jPanel1.add(Murid);
Murid.show();
Murid.toFront();
} 

Thank For Helping

What Should I do To Make Sure The JFrameForm Label Is In Behind JInternalForm Not In Front Of It??