I have a voice pro 206. I have no access to the mailboxes. I have pressed the reset button on the back of the unit, I have used the system reset command 99, I have also gone in and used program 26 to reset mailboxes individually. I still have no luck. When in the program 26 mode it will accept the reset command but access the mailbox it states "invalid data". No matter what button I press all extensions are labeled "not available" I also not able to get past record directory names "program 28 is invalid" Any input would be gr8