T-Mobile MDA email error

[Guest crzyspaniard84]

ok so i just got my tmobile mda. i setup my email using the little link on the main screen. i typed in my email info and it set up the account. now the problem is taht whenever i receive an email and i read it or even if i just leave it in the inbox the next time the device checks for new emails it deletes all the old emails that were already read. Help anyone on how to keep new and read emails on it. Thanks.