Problem With Charter Email On iPad Wifi?

Hi, I just bought an iPad 16GB wifi (with the newest iOS 4.3.1) and I am having trouble with getting my charter.net email to receive consistently. I entered all the settings that charter has on their website specifically for the iPad, and things were working perfect for about 4 days until this morning when the iPad deleted all the emails in the Inbox and did not receive any emails for the rest of the day. What are the correct settings for a charter account? (Also, my charter account is linked to my PC on Windows Mail, which never has any problems sending/receiving, and also my Motorola Droid, which began having the same problems as the iPad recently) Any help would be greatly appreciated, thanks!