3 mobile sim not working in MR600
I've just purchased a MR600 router and a 3 mobile sim contract for internet in my office.
The sim works fine in my phone and tablet but when I put it in my MR600, it doesn't connect to the internet. The WiFi and power lights are on but no connection.
the Network Map Advanced page notes 'No SIM card detected, while the IP address, primary DNS and Secondery DNS are all showing as 0.0.0.0.
please can somone help me get this set up and working?!