Network not ready. Try again message

Hi there, I'm trying to send an SMS but I keep getting this message. I've cleared my cache, toggled Airport button and re-started several times but still no joy! Any help please?

Have you looked at the network status checker to see if there are any issues in your local area BenF1? If all clear there then you should give customer support a shout.

Thanks Martin, I did that yesterday so hoping to hear from them soon!