System Exec+ "CMD /C START DESK.CPL" won't work--why?

I've seen previous posts stating that the System Exec is the equivalent of the run box in windows (explaining why you can't execute commands like "dir").
However, I can run a line like this...
CMD /C START C:\WINNT\SYSTEM32\DESK.CPL
or
CMD /C START C:\WINNT\SYSTEM32\NIPORTS.CPL
..from the run menu, but not with System Exec+. CPL files of course are executables that load in the control panel and a WinNT shortcut will not show you the path.
The workaround is to create a batch file on the fly and execute the text above (since porting the application to a different computer means there might not be an existing batch file). The batch file looks like:
@CMD /C START C:\WINNT\SYSTEM32\DESK.CPL
@EXIT
I don't like having to generate a batch file inasmuch as it does get the job done, there is still the clunky dos box that flashes onto the screen for a brief second. Does anyone know what causes the above discrepancy? ...why it will run from the windows run box, but not with System Exec+? I'm guessing it has something to do with using the START command but I have never had to use it before in this fashion. Any ideas?

Arg! You're right!
I originally tried this with NIPORTS.CPL and used DESK.CPL in the above example (without testing it) because everyone has desktop properties but not necessarily the port properties for the E-NET/RS-485 converter. I'm guessing there was a spelling or path error somewhere that wouldn't let my original attempt execute--it works now.
Also: I didn't realize that any time you execute CMD that it will show a dos box, not just for batch files. Oh well...
Thanks for your input...

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Hello, first time posting a question!
I have spent a good while trying to find an already posted answer to this, and looking on the wider web, hope i have not just missed it.
I am using XP Pro SP3, LV 8.6.
I am not very familiar with Windows command lines and structures etc.
I am using the System Exec VI to start a third party piece of software. I have wired the path in to the path input, and if i wire cmd /c start xxx to the command line terminal the VI will run and start the software application (xxx.exe). As the VI executes the cmd window clunks open and closed. If i run the VI without the cmd /c part of the command then an Error 2 is returned (as widely reported by others).
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Message Edited by BlueTwo on 09-25-2008 09:22 AM

Hi Thoric, thanks for the suggestions, Success!
I tried the True boolean to the Run Minimized, but it did not help.
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