You'll probably have to set up your Outlook 2007 email through your BIS account. You'd add the account, password and configuration on the website and it should automatically show up on the BB. Then you can sync it then.
Don't know who / how you have your Outlook eMail but you'll probably need like your SMTP and POP3 server addresses to put into the BIS account.
The problem is when you setup outlook you are not keeping a copy of messages on the server and everytime u get your mail there is nothing left on the server as for the old mail double check your sync asettings in dm
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