DockWindow conflict with CreateSb

I make a Sidebar dialog that dock at either the left or right side of the window. I also created a statusbar
that use Ktools.dll CreateSb to "dock" at the bottom of the window.

However, it seems like when the statusbar is created, and when I turn on the option to load the Sidebar , mirc crash. I trace the statement that suggested the fault to
dll dll\ktools.dll DockWindow $dialog(sidebar).hwnd > left.

But If I load the Sidebar first follow by the statusbar, it wouldnt crash mirc! What is wrong?