You have not sold 150k worth of drugs to him within the last week.Or there might be a couple other reason such as you was offline when he changed spots,you was on a government job when he switched.ETC
You have not sold 150k worth of drugs to him within the last week.Or there might be a couple other reason such as you was offline when he changed spots,you was on a government job when he switched.ETC
Basically what Jack also mentioned, to get access to these messages you either have to sell a certain amount of drugs which I believe was indeed 150k, or by being in an organisation which has unlocked the perk. You also have to be online without being on a job while he moves to actually get the message.