404 error?

Does anyone get this 404 error when they try to create an app from a directory?

I just started this Yahoo Mail app today and apparently I am getting errors when it tries upload the app to the server.

CODE

Done all gets for hello.
Application '3eoj66li3adpo' created.
NOTE: Your application has been created.
You no longer need to run ymdt create for this application.
Use ymdt put to upload files instead.
	uploading /Users/username/hello/auth.xml. . .

dev.file.put invoke failed (HTTP 404).

Server says: Application 3eoj66li3adpo not found.

Webserver: om0403.mail.ac2.yahoo.com

See error.log for more info

I looked on this page but it didn't really help: http://developer.yahoo.com/yap/guide/other-code-exs.html

Does this error mean anything?