Support could not take screen capture with Stratosphere 2

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http://androidforums.com – Lots of pages say that you can take a screen shot on a Stratophere (I) by pressing the Home and Power keys together: Samsung Stratosphere: How to Take a Screenshot That works on my Stratosphere I. However I had a Stratosphere II for about a week and the home-and-power key combination did not work for taking a screen shot. I called Verizon tech support and they had no idea how to fix it. I found one other thread: screen shot on samsung stratosphere 2?? - Android Forums at AndroidCentral.com where someone reported the same problem, and they said they discovered some trick involving the vol (General)