custom url is giving 404 errors

For at least, the last two days my custom url is giving 404 errors

"Feed Address: http://feeds.bugabundo.net/BUGabundo-...
HTTP Error (Code) and Message: (404) Feed not found error: FeedBurner cannot locate this feed URI.
"


Please help me fix this.
All other feeds seem to be working and I've checked the source and FeedMedic, both are fine!