I have a MICS 6.0 with PRI. On a particular M7324 set I am having trouble getting the caller ID to work. The set has several DID line appearances on it. When I go under the heading Telco features for this set I normally have a choice of setting caller ID to yes or no for each line on the set. On this phone I don't even get that option just the external message option comes up only. What am I overlooking is there somewhere else I forgot to allow caller ID for this set that when I change it will then give the options for the lines. Thanks