DisplayPanel() doesn't display window

[GICH]

Hello,

I'm using this function to display a panel from a menu bar. 

void CVICALLBACK aff_data (int menuBar, int menuItem, void *callbackData,int panel)
{
   DisplayPanel(data_login_handle);

}

The function is working well with french and english version of windows XP but does absolutely nothing with korean and japanese version of windows XP (the panel doesn't show up).  I use DisplayPanel() successfully somewhere else in the code for other panels.

What should I check to debug this kind of behavior ?  Any clues would be very appreciated.

[dilution]

Sorry to be so trivial, did you try to add ProcessSystemEvents after the DisplayPanel intruction ?

void CVICALLBACK aff_data (int menuBar, int menuItem, void *callbackData,int panel)
{ 
DisplayPanel(data_login_handle);

ProcessSystemEvents ();
}

[Wendy L]

Hello Gich,

You mentioned that the DisplayPanel works in the rest of your program, so I'm not sure if it is an OS language specific problem.  I notice that the callback is actually a menu callback, after adding a call to ProcessSystemEvents as dilution suggested, does the problem still occur?  I would also make sure that the handle you pass into DisplayPanel is valid.  Also, which version of CVI are you using?

Thanks.