Darshu

Hello Guys I Have Problem with native Trainer Native trainer not working it comes up but i cant navigate the menu hey guys i am having a problem with gta iv simple native trainer 6.4 ok whenever i install the trainer i press f3 and it comes up but when i press 5 or the controls to work them they dont work I have Dell Insparon Desktop in keybord have always numpad ON so there is no key to Off and On so please gusy help me how can i navigate the menu how ??? please I have attached my keybord's pic