1. You need to download the Force OP from the link below.
2. The next step would be to extract it from the ZIP file to your desktop or wherever you want it…
3. Once you have done that, open the Force OP tool.
4. Fill in your Username and the I.P address of the server you wish to become admin on
5. Press Start and the program will automatically Force OP you the next time the server is reset (even if you turn your computer off and the server resets, you will still be admin)
6. To stop being admin simply repeat the process!