I got a problem when try to move my progarm form solaris to linux..

here is the code in solaris,it will read the file "Xmfc" when running.
But it seems cannot read when running in linux!!
i really want to know why?

#include
#include
#include

Display *display;
XtAppContext context;
Widget toplevel,manager,exit_button;
...

int main(int argc, char **argv){

....

XtToolkitInitialize();
context = XtCreateApplicationContext;

strcpy(dpy,":0.0");
display = XtOpenDisplay( context, dpy, NULL, "Xmfc", NULL, 0, &argc, argv );

toplevel = XtAppCreateShell( NULL, NULL, applicationShellWidgetClass, display, NULL,0 );

manager = XtCreateWidget( "manager", xmBulletinBoardWidgetClass, toplevel, NULL, 0 );

XtManageChild(manager);
XtRealizeWidget(toplevel);
.....
XtAppMainLoop(context);
return 0;
}