Initiate parallel computing in CDF file?

Hello,
Here a really simple cdf example where I multiply two random vectors but when I want to run a ParallelDo calculation I get an warning message “No parallel kernels available; proceeding with sequential evaluation” . According to
https://www.wolfram.com/cdf/adopting-cdf/cdf-and-mathematica-comparison.en.html
Parallel computation is possible. Is there a command to initiate parallel computing in CDF file?

Does LaunchKernels[] help?

no it does not. I tired that too before posting it. I should have added that detail.

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