Go into the AA 9997, PW, dial 9 for admin menu, select 3 for AA, select 1 for day menu, select option change menu, select change selector code. At this point you will enter a code from 1 thru 9. Your choices will be- Play an announcemnt, transfer to an extension, direct extension transfer or unused. Make sure that the selector code(s) that correspond to your extension numbers are set for direct extension transfer or outside callers won't be able to dial your extensions directly.
It sounds as if you had selector code 1 assigned to an announcement, if you haven't changed selector code 1, it will tell you which announcement number is assigned, if you have erased or changed it, you will have to create a new announcement or find the original one. Lets presume its announcement 1. For selector code one, choose the option to Play an announcemnt, and then enter 1 for the announcemnt.
At this point, I will strongly caution you to listen "VERY CAREFULLY" to the instructions. Particularly after finishing your selector codes, she will say something on the order of to "use the current settings and save all changes...hit # (or *#, I'm not sure which) if you omit this step, nothing you've done will take effect.
Next, from the main menu, select 3 for AA again, but this time wait for the Announcement code (4 maybe) select 1 for Play announcement, select 1 for announcement 1 and see if this plays your directory, if not hit *# and enter 2 for announcemnt 2 and so on until you find your announcement. If it turns out that your directory is not announcemnet 1, make sure you correct selector code 1 to reflect the correct announcemnet number.
Sorry to be so sketchy about the numbers to dial, but I normally don't deal with voice mail, but this and the voice-mail 'lady' should get you going.
By the way, I believe if you instruct your callers in the main greeting to 'press *2 for a directory of employees by first (last) name' they will be directed to the VM's directory, saving you the trouble of having to update an announcement.
Good luck.