ok. very sorry, everything is now working fine. at first i used only a few line of your code, and the rest was my solution. If i copy all your code, virtual keyboard works perfect. My bad. respect for your job 
ok. very sorry, everything is now working fine. at first i used only a few line of your code, and the rest was my solution. If i copy all your code, virtual keyboard works perfect. My bad. respect for your job