Open the panel.cfg (found in FSX-SE\SimObjects\Airplanes\CS_B757-200-III_PW2037\panel) with Notepad, and place ; in front of the [Window00] gauge01 entry, like this:

[Window00]
background_color=0,0,0
size_mm=1024,768
window_size_ratio=1.00   
visible=1
ident=MAIN_PANEL
render_3d_window=0
window_size= 1.000, 1.000
window_pos= 0.000, 0.000
gauge00=y757.P01_2D!hk,                      1,   1,   1,   1
;gauge01=update!Main,                         0,   0,   1,   1