Hi Roger,
Did you run the following command to the dedicated user? It's documented in the Install guide.
useradmin role add balance_user
-a login-http-admin,api-system-get-info,api-system-get-version,api-
license-list-info,api-fcp-adapter-list-info,cli-fcp,api-cf-status,api-
disk-list-info,api-aggr-list-info,api-volume-list-info,api-volume-list-
info-iter-start,api-volume-list-info-iter-next,api-volume-list-info-
iter-end,api-volume-get-root-name,api-lun-list-info,api-lun-get-
geometry,api-lun-map-list-info,api-qtree-list,api-lun-get-serial-
number,api-lun-stats-list-info,api-system-cli,cli-rdfile,cli-
ifconfig,api-vfiler-list-info,security-api-vfiler,api-nfs-status,api-
nfs-exportfs-list-rules,api-nfs-exportfs-list-rules-2,api-cifs-
status,api-cifs-share-list-iter-start,api-cifs-share-list-iter-next,api-
cifs-share-list-iter-end,api-perf-object-list-info,api-perf-object-
counter-list-info,api-perf-object-get-instances,api-perf-object-get-
instances-iter-start,api-perf-object-get-instances-iter-next,api-perf-
object-get-instances-iter-end,api-useradmin-user-list,api-useradmin-
group-list,api-useradmin-role-list
where
balance_user
is the name of your user role.