My problem is that the phone does not allow me to change the ring tone in my ‘Home’ group.
How did I come to this?

At first everything was working great, I was able to set my own .amr file as my new ring tone. Then I modified the file with the PC and then replaced the file in the phone with the new one. When I had done this the ring tone was set to default by the phone and now it does not allow me to change it. If I would select any other ring tone the phone just goes back to ‘Group ringing tone’ selection without saying anything but if I would select default the phone says ‘Group ringing tone changed’ before going back.
All the other groups are still working fine.

Any ides how to reset this ‘feature’ back to what it was?