Question to HSProperties()

I used HSProperties() to play a bit with the wes servers stack sizes and it worked just fine. But now I would like to change the task priority of the web server through this function and it has no effect? Can anyone tell my why? Right now I surge for the thread pointer by the thread name “HSV” and use tx_thread_priority_change() to do the job - but I think, this is a bit oversized. Thanks for your help! Bye, Konni