Thanks for your tips. From that I now edit Fill Ins this way:

1. Sequencer
2. Realtime Record
3. Drm
4. Click Start, and enter a Drum Beat(s) on your keyboard at the exact moment(s) you want a Fill In
6. Exit
7. Sequencer
8. Edit
9. Note Edit
10.Drm
Move the cursor. You will see and hear the drum beat(s) you entered
11. Write down the exact measure(s) of the drum beat(s) you entered (Example: 30.4.48)
12. Exit
13. Step Record
15 CTL Record
16. Move to Measure 30.4.48 and click the Fill In 1 or Fill In 2 button. Move to the next drum beat that you wrote down and again click a Fill In .
Click Sequencer to Save and Exit .
Play the song and the Fill Ins are inserted Perfectly

Thanks
Larry Hawk