We are running ALM Explorer version 12.20.3264.0 and UFT 14 build 1775 on MS Windows Server 2012 R2 standard 8 gig memory

I have a common lib function which uses a Window("Facets").WinTreeView("SysTreeView32").Activate strNode when this is simply run it never opens the node specified BUT when I step through the code it works every-time? I have tried to simply record the same operation and play it back and I can’t get it to work either. What can I do to fix it?