Manage Subscribe -- Send Pre Scheduled SMS contents


I’m going to use PlaySMS to send some pre defined text contents (Like Daily Horoscope, Cooking Recipe, etc…) using SMS Subscribe feature.
I have defined a Key Word for a service and added some of my text contents as that keyword’s messages in “Add Message” page. then I managed to subscribe couple of my test numbers to the service using PlaySMS’s web service.
But until now, no message has reached on any of those subscribed numbers.
Is there any way PlaySMS send SMS contents to the subscribers of a KeyWord automatically (I mean orderly or by random among the messages have been added to the keyword) or not?

Thanks in advance