It might happen to some computers with a Duo-Core/Multi-Core processor that you run way faster then other people.. looks like a speed hack so please follow these instruction to prevent from being banned:
1) Open NetKO Online.
2) Press CTRL ALT DELETE on your keyboard to open Task Manager.
3) Go to Process
4) Right click on NetKO.exe
5) Set Priority or Affinity to 1 CPU
6) and deactivate 1 of the core processors. (for multiple cores just make sure only 1 CPU is checked)
This should fix the problem.