Why input voltage couldn't display in chart ?

In my vi,why input voltage couldn't display in chart ?
please see the attachment
Attachments:
singal requency.vi ‏33 KB

Well, your ai runs at 10000Hz and your ao runs at 20Hz, so start there .
If they should be really synchronous, run them off the same clock.
LabVIEW Champion . Do more with less code and in less time .

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ok,
so i have an NI DAQ I/O card (NI PCI 6723, or something to that effect) and i'm trying to configure the channels for Analog Input signals.
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stuartG,
you were right. so what i'm using for the input is a ADAC 5501MF from IOTECH
following their manual (http://www.iotech.com/productmanuals/adac_lvi.pdf) it says that the ADAC-LVi libraries can be located at "Functions->User Libraries" palette of labview.
does this mean that i have to install the ADAC-LVi driver in LabView->User Libraries directory?
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do you have any idea why?
thanks
-r

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Why input voltage couldn't display in chart ?

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