Welcome to us mere mortals ! 8)
you have the "xxxx" wired up the wrong way. Even if your 100% sure like me
Thanks for sharing.
Electronics is not like building LEGO: Try and try until it fir or doesnt break. It actually is an engineering discipline. Forturnatly for some of us most componets are forgiving to wrong connections (for a while, at low enough voltage, sometimes ... 
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