I have a Partner Messaging r1.0 voicemail system on a Partner ACS switch. We're trying to create voicemail boxes for guest users. We've been successful up through extension 57. After 58 the voicemail boxes seem to create successfully but you can't transfer, copy definitions, or dial (from the intercom) the mailbox. You get an error tone when doing so.

Anyone have any thoughts on what we may be doing incorrectly on the setup?

Thanks!