Cannot progress in cuelist

I am trying to build a very simple cuelist to try out triggering it with the space bar, but i cannot get it to work correctly, i have set the first cue in each block with the pause button on. When i go to the top of the cuelist and hit space the first cues run fine and the playlist pauses on the first wait cue. But if i then hit spacebar nothing happens??

Any ideas??

Cheers

Gareth

Ignore my stupid question, i has set the clock to internal not internal relative, doh!!

Cheers

Gareth