How to update the tag value using button widget.

Initially posted in this topic

I am using s7-1200 plc , i want to write the plc tag value from thingworx to kepserver after that plc.  It is a memory tag and boolean.  from remote thing if manually i can set the value true/false, it is changing in kepserver, but through button widget not happening.  How to update the tag value using button widget.  Pls help me out