Possible reasons and solutions:
1. did not open in Admin model.
- Install well the driver, the correct way is to firstlyopen Insite, then exit, then again open the program you want to active and complete activation.
- Tick on “Run this program as an administrator”.
4.Do not change settings: country and language.
Please do following Cummins INSITE 126.96.36.199 installation guide: http://www.uobdii.com/upload/pro/cummins-insite-811199-software-installation-manual.rar
Hope it helps!
Another possible reason: the operation system has not been activated.