How to do frequency division to a external signal use the api with vc

i use the api and vc do frequency division.
and i choose the function DAQmxCreateCOPulseChanTicks
the problem is the parameter of sourceTermianl in DAQmxCreateCOPulseChanTicks
i just do not how to use it, please help me ,thanks

    I can`t see your VI cause i've a lower version. I hope this VI to do what you want. 
But now i have one question: Somebody knows why i get this message when i enable the disable diagram of the this vi? The message is attached, version is 8.0, winxp.
Paul
Mechatronic engineer
Lima-Perú
Attachments:
FOURIER_TIME_SCALING.vi ‏25 KB
msg.JPG ‏31 KB

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