This seems to be a technical issue as i've never heard of a network merp code... derp!
Raise a ticket over at the website and i'm sure this'll be resolved easily!
I presume that the message was "network MEP code" which is a Blackberry's way of telling you that the handset is locked to another operator. You will need to get the handset unlocked for use on 48. You probably need to talk to your current/old operator to get this done. There may also be unofficial (and some free) ways of getting it unlocked but usually getting a handset unlocked officially is better if possible. Google more info using terms like "Blackberry" "network MEP code" and "free unlock".
Hope this helps.