[Box Backup] Starting bbackupd programmatically on Mac OS X

[patrick machielse]

I'm trying to start and stop bbackupd from my Mac OS X program. I use  
the AuthorizationExecuteWithPrivileges() function to start the daemon  
with admin privileges. Starting bbackupd works fine, but when I then  
try to quit bbackupd (again using  
AuthorizationExecuteWithPrivileges), bbackupquery responds with:

2006-04-19 18:39:16.852 BackToDate[487] Server rejected the  
connection. Are you running bbackupctl as the same user as the daemon?

The answer to that question is yes, as far as I can see. [b.t.w. the  
use of the word 'Server' is a bit confusing, since I presume the  
daemon/client is meant]. When I read the .pid file and use /bin/kill  
to stop bbackupd I don't get any complaints, and bbackupd exits.

I am able to start and stop bbackupd from the command line using  
'sudo', either directly or through a StartupItem I created.

Does anyone know what's happening here?

patrick