Conf with A&H

A&H handbook says if your extension is 200 the dial 8200 for the conf room. When I dial that is an invalid conf room? What aim I missing?

do you see the rooms setup in meetme_additional.conf ?

this is in there;
conf => 8200
conf => 8201
conf => 8202
conf => 8203
conf => 8204

maybe you have not a timer for meetme.
what 's asterisk version and linux version?