Tag history not working for new taGS

Built a pop-up window with an easy graph on it and populated it wit tags from a PLC input module.
works great.
built a second one to a different PLC. similar to the 1st so I exported the tags and rebuilt them in json, then imported them. built a new window and dragged my new tags to the new window. The tags are good
and so as historical tags, but when I look at the new window there are no traces.

Here is a screen shot of the working window

and here is the one not working:

how do I fix this???