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Treo 750 ignoring Win Mobile power management calls that work on other phones

I've got a CPU intensive animation app that needs to run for many minutes at a time without the phone shutting down.   Up until now I've used calls like:

SetPowerRequirement(TEXT("BKL1:"), D0, POWER_NAME, NULL, 0);  and  
SHIdleTimerReset  at intervals

On other WM5 phones, this has worked fine.  On Treo 750,   the app is getting a DEACTIVATE message and shutting down under a minute of elapsed time.    I've also tried using  TIMEOUTDISPLAYOFF and CreateEvent/SetEvent.   No change in behavior.

Are there other ways of getting this done that I can try?  

Thanks in advance.
Smartphone Programming

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smgr478

8/22/2022 - Mon
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smgr478

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