This is why because ORBCOMM satellit has disabled your M10 trasmitter. This happens when you have an outdated subscription.
When you buy a Digi M10 JSK from Digi they give you a 90-day free trial of ORBCOMM satellite subscription. After this 90-day period you have to talk to ORBCOMM directly and buy a subscription. However, Digi will support you in all M10 queries even after that.
Once you get a subscription from ORBCOMM you can talk to ORBCOMM tech support (Service.Customer@orbcomm.com) and request them to activate your Modem.
Then they can instruct satellite to sent out a packet to M10 modem to activate your transmitter.
he he interesting setup is it ?