Next time, please make sure to take a look at the "READ BEFORE POSTING" sticky post before making a thread. There are some common issues (like yours) that are explained there.VeilStar wrote:
If it won't let you submit your own beatmap as it says that you don't own the map then do the following;
Go to the mapset's folder. You can get there easily by going to 'File' -> 'Open Song Folder' in the editor.
Leave the editor (or close osu!) to make sure the changes apply properly.
Open the .osu difficulty files with any text editor. (Such as Wordpad or Notepad.)
Enter your name as creator. (If your name has spaces/underscores, these should actually be spaces in here.)
Set the BeatmapID to 0.
Set the BeatmapSetID to -1.
Make sure the beatmap folder name does not start with a string of numbers.