diff -urN app_voicemail.c app_voicemail_patched_trunk.c
--- app_voicemail.c     2007-05-16 11:52:36.681363200 -0400
+++ app_voicemail_patched_trunk.c       2007-05-16 11:56:44.357504000 -0400
@@ -4813,8 +4813,9 @@
        ast_build_string(&t, &left, "{%s:%s/imap", imapserver, imapport);

        /* Add authentication user if present */
-       if (!ast_strlen_zero(authuser))
-               ast_build_string(&t, &left, "/%s", authuser);
+       if (!ast_strlen_zero(authuser))
+               ast_build_string(&t, &left, "/authuser=%s", authuser);
+

        /* Add flags if present */
        if (!ast_strlen_zero(imapflags))