I notice that your message header indicates Office 2010 64 bit. I have no idea to what extent the 64 bit version will work correctly with DTPicker (if at all).

Did you set the initial value of the picker e.g.
There's an alternative picker available from Trevor Eyre that will work when DTPicker is a problem You can find that here. Although intended for Excel, it needs only very minor mods to work in Word, and I use it in a couple of my own add-ins.

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Graham Mayor - MS MVP (Word) (2002-2019)
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