[Simba][SMART][SRL][CORE] -Bug: KeyDown(13) KeyUp(13) PressKey(13) dosn't press enter

[Zorgatone]

program new;
{$DEFINE SMART8}
{$i srl/srl.simba}
begin
    SetupSRL;
    wait(1500);

    KeyDown(13); // Presses the 'ENTER' key. (Does not work).
    wait(RandomRange(50, 100));
    KeyUp(13);
    wait(1500);
end.

This code doesn't press ENTER on the keyboard... I've tried to confirm the amount of items to sell at the G.E. and it didn't work. Why?

E1: I think this is not a SRL issue.. Is it Simba?

E2: If I use SendByte I can make it press enter.