I'm using ROOT on X terminal running fvwm-95 window manager and each time I 
create a canvas it's position changes randomly on the screen with the same
wtopx and wtopy in
TCanvas(Text_t* name, Text_t* title, Int_t wtopx, Int_t wtopy, Int_t ww, Int_t 
wh).
Position of canvas window is correct only when I use NCD window manager.
    Does anybody know how to fix position of canvas under fvwm?
Any help is appreciated.
I'm using SGI CC compiler version  1.01/07 on  IRIX6.2 system.
Yuri Gotra