Could you fill us in on more information about your 7100?
Are you on BES (Such as the blackberry came from work, or you signed up for it through a 3rd party)? Or BIS (The internet Blackberry Service you get from a service provider...cingular, sprint, verizon, tmobile, etc.)?
I know this may sound dumb, but are you sure you have your blackberry set up on the blackberry package that allows you to get emails and surf the internet?
And lastly...Did you set everything up on the blackberry BIS setup page that your service provider has for you?
Device: Sprint 8330 Curve - Crimson
My heart belongs to Seattle18 (Who I met on the Forums, ironic.)