I did get a single submission from a J with a score of 4605. It looks like your score submission may be working, but for some reason the score fetching is breaking (the timeout is a couple seconds, does it feel like you're exceeding that?)
In the meantime, since your scores appear to be going through, here are the current high scores you can try to oust :)
- ALEAR: 39534
- JARM: 37231
- JARM: 26499
- XI: 23533
- GCCOM: 17239
- BOB: 16132
- XI: 16008
- XI: 15996
- GCCOM: 15736
- ZEB: 15500