SQL Azure Automated Backups doesn't work

SQL Azure Automated Backups doesn't work

I configured automated export of my SQL azure db, but backups are not
created. Also, I'am resieved this mail.
Automated SQL Export failed for pgmkixvn6d:aplicensingdb at 25.09.2013
23:06:45. The temporary database copy was made, but this copy could not be
exported to the .bacpac file in storage.
NOTES: We recommend checking that the storage account is available, and
that you can perform a manual export to that account. We will attempt to
export again at the next scheduled time
I tryed to export db manualy in this storage accaunt — it was created
without problems.