[Skunkworks] Safaricom Postpaid line internet set up

Hi skunks, Been cracking my head with this all morning. I have been trying to set up Mail for Exchange on a Nokia E52 handset and was getting through to the end OK, except when I try to view the mailbox or send an email, nothing happens. I then realized that the Internet settings on the phone aren't activated. I've activated the settings severally but the phone still can't connect to the internet. Are the settings and steps different for a post paid line as compared to the pre-paid??