[CrackBerry Question]

Every so often, my device seems to lose the email connection with one of my email accounts with the BB server; returns an error message that the account information is incorrect. Sometimes both incoming and outgoing messages are affected The most recent instance affected only the outgoing messages, which would not send. The password seems to have been lost from the settings, and when I re-enter the password the message is something like "cannot connect with server". Have solved this several times by deleting and reentering the account, which is a nuisance. Any insights on how to make this stop?