After changing the digitizer on Apple Watch 4 touch don't respond

After changing the digitizer on Apple Watch 4 touch don't respond

Hello, After changing glass and digitizer on Apple watch series 4 40mm, the touch screen don’t respond.I thought the purchased digitizer did not work so I re-installed the new digitizer but it still does not work.I think the connecting cables were not damaged during the repair. any solutions? Does changing the display flex cable help this problem?This is a picture of the digitizers I bought