Hm, that looks like a normal start of launchpad. When you say nothing happens at all, when you press these keys, I guess they were not correctly registered.
There is a _maximum_ delay between the key presses. I think the overall delay is by default at max. 700 msecs, the between-single-key interval is at 300 msecs maximum. Soooo... be fast :-) Or just edit launchpad.ini - the intervals are defined in there.