[XPanel] Gap between notification bar and panel

[mymailx]

I'm using WM6.5.5 which the top (notification) bar is smaller, so it causes there's a gap between the notification bar.
I wonder how to reposition the panels?
Can somebody guide me?

 

[Silver-7]

install the new X2 panels from SE website, they been made 4 WM 6.5.X