You need to select DPM (Data Position Measurement) to create a working SecuROM image. Then you need to find out what DPM speed is best with your drive. Some people report a high speed gives better results, while others have more success at low speeds. With my drive (NEC 3520) I get best results when I select 8X for DPM.
There is a possibility that you will need to create a few images before you get a working one. But once you know what DPM speed gives you best results, you can create working images for other SecuROM protected games from the first try.