Calling our own number

Hello,

There is something that I havent been able to make it work,
calling ourselves. Ex : our did is 1866-123-4567, incoming and outgoing calls work,
except when calling our own number, always get something like ; Unable to create request with auth. or
everyone is busy / congested at this time,

Any idea?

Im so stupid!!!
Just realized that I dont need to call out to call our own box!!!
just put the number as another extension!