ubuntu 12.04 nmcli doesn't list coections under one no-login user

I am ruing bacula as my backup system and I would like to run a script before some backup jobs to establish a VPN coection and access some servers that don't have public IPs.

I have configured a PPTP VPN that I can start successfully with the command

nmcli con up uuid xxxxxxxxxxxxxxxxxx

bacula is also the user under which the program runs filling the disk with the backups, coecting to the servers, etc. Before each job this last command is run, but the output is:

13-Apr 12:58 server_name-dir JobId 3577: BeforeJob: Error: Unknown coection: xxxxxxxxxxxxxxxxxx.

If I list the available coections under my user with

nmcli con list

I get everything as expected. But if I run this command under useame "bacula":

sudo -H -u bacula bash -c 'nmcli con list'

The list comes empty. Also:

sudo -H -u bacula bash -c 'nmcli con up uuid xxxxxxxxxxxxxxxxxx'

Gives the same error message as before:

Error: Unknown coection: xxxxxxxxxxxxxxxxxx

Is there something I should do different? What may be wrong? Why can't bacula see the coections but my user can? Has it something to do with me being in the sudoers group? I don't run nmcli with sudo when listing coections so I don't think that is it.