Thank you for helping.
Yeah i know that, but after deleting some checkpoints the names got out of order, i could not change theire names either.
But it's working for me now. I deleted editor_dump, and editor_test from the resources folder, don't know why but i had a different problem before and someone said to delete them. Then i placed a new checkpoint, then doubleclicked on the previous, and in the properties i changed nextid to the new checkpoint. When i did that it worked. I had to manually change it a few times then it suddenly went automatic. Have place many checkpoints since then and have had no problems. But when i browsed for the new checkpoint it diden't show up on the list until i deleted editor_dump, and editor_test.