BlackBerry Forums Support Community - Switched SIM to new handset, now can't use email

Hi there, let me start off by saying I am not the most technologically gifted person in the world, nor the most patient. I damaged my old Blackberry (Curve 8520) a few weeks ago, and as the replacement fee was extraordinarily high and I was unhappy with the model anyway I bought a new handset - Bold 9780 - and put my old SIM in it. My dad has a T-Mobile Blackberry, which he was paying for on a month-by-month basis, so he had T-Mobile unlock his phone as I'm on Orange and he now uses the contract I purchased for my new Bold. This whole set up was arranged by the guy who works at the Phones 4 U I bought the phone at, and he said it would be a simple switchover, however I am having the hardest time trying to figure out how to switch my email over to the new handset. When I open up my messages I get the screen that says:

Quote:

No message services configured. You will be redirected to the Set-up Wizard to set up your email account.

Fine, no problem I thought. I click on "Internet Mail Account" as it's a gmail account I want to add and get this screen:

Quote:

A new Blackberry device has been detected. You must move your email account(s) to resume email delivery to your Blackberry device. Email delivery to your old device has been stopped.

So I select 'move', type in my password and a pop-up screen tells me it's been successfully validated, and my email appears under the "Email Accounts" screen. However, when I go back to my messages and try to write an email I only get the option to save a draft. I then go back to the set-up screen and am presented with the exact same messages and options to move and validate my email address. It's SO frustrating and I genuinely have no clue what I am doing. I would really appreciate some help with this! Thank you.