I am trying to have the ability to remote login to the voicemail and listen to my message, however I am unable to get passed a mailbox does not exist message.

I have set the number to route DID into 555@200 and this goes straight to my voicemail so that I can leave a message. From here I have set the next call routing mailbox and set the # to be Login IXXX

When I press # I get to the second mailbox routing, I can then press # again and the system ask me to enter my mailbox number, however whenever I enter 200 I receive a this mailbox does not exist message.

How can I listen to the messages that are on the system?