I want to control two relay, but Labview says I have something wrong with my VI

Question

From the picture, I have 2 relays to control, they are both toggle on/off type, I want to control them at the same time, but fail to do it.
I already set digital>multiple channels>single sample> 1D boolean(1 line per channel) and before I run, i pick channel 0 and 1 in the front pannel
When I run, the program doesnt give error, however, I use voltmeter to test the voltage at port 0 and port 1, they are 5V and steady....which doesnt correspond to the VI i write
After I hit stop, Labivew says,
pecified read or write operation failed, because the number of lines in the data for a channel does not match the number of lines in the channel.
If you are using the Digital Waveform datatype, make sure the number of lines in the digital waveform matches the number of lines in the channel. If you are using boolean data, make sure the array dimension for lines in the data matches the number of lines in the channel.
Number of Lines in Channel: 8
Number of Lines in Data: 1
Task Name: _unnamedTask<4>
What's wrong with my VI? thank you
Solved!
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Attachments:
Capture.JPG ‏56 KB
BEI Delay.vi ‏30 KB
relay board testing 2_17_2013.vi ‏22 KB

Answer 1

thank you here are the VI
I already picked channel 0 and 1, when i hit run, no error, but volmeter show steady 5V at channel 0...
WHen I hit stop, labview give me similar errors:
Possible reason(s):
Write cannot be performed, because the number of channels in the data does not match the number of channels in the task.
When writing, supply data for all channels in the task. Alternatively, modify the task to contain the same number of channels as the data written.
Number of Channels in Task: 1
Number of Channels in Data&colon; 2
Task Name: _unnamedTask<E>
I am using USB 6008
Attachments:
relay board testing 2_17_2013.vi ‏22 KB
BEI Delay.vi ‏30 KB