Express xy graph second plot

Hi , Im trying to get a second plot on the express XY graph.
I've tried some of the suggestions like building the x array twice ( concatanating ?) but this does not seem to work for me.
Is there a tutorial on multiple plotting with this beast anywhere?
I've enclosed a simple vi . Help please!!!!
dht
Attachments:
StraightLine Stats.vi ‏134 KB

Use the merge signals VI, note that you have to have an equal number of signals for X and Y. I've attached a short example.
Regards,
Ryan K.
Attachments:
Multi Plot XY Graph.vi ‏89 KB

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I'm trying to have several plots in an Express XY graph and use it without clearing data on each call - like a chart.
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Attachments:
XYtest.vi ‏117 KB

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