Can't Access Auto Attendant Settings

[quino12]

I need to re-record the auto attendant menu on my 1400 series phone. I should be able to access that menu by dialing the extension 7841, according to both the user manual and the IP Office Web Manager. However each time I try to reach it, I get the default message that the number can't be accessed.

One of my guesses is that my phone doesn't have the permissions to access that menu. I tried using IP Office Web Manager to give my extension "system access" on the user menu but it won't allow me to save that setting. None of the other extensions have system access enabled either.

That, or I might be missing something incredibly basic. Any suggestions welcome.