7650 simple yes/no query

CEikonEnv::QueryWinL doesnt seem to work. It crashes the program when tried to launch. Is there other solutions available?

I did this by instanciating a CAknQueryDialog constucted with a resource as follows.

RESOURCE DIALOG r_yes_no_dialog
{
flags = EGeneralQueryFlags;
buttons = R_AVKON_SOFTKEYS_YES_NO;
items =
{
DLG_LINE
{
type = EAknCtQuery;
id = EGeneralQuery;
control = AVKON_CONFIRMATION_QUERY
{
layout = EConfirmationLayout;
};
}
};
}