Double check your you typed in your email address and password correctly. I have found it is easy to hit the wrong key when typing the password on my Blackberry and it messes up the whole thing. Usually it's the simple things to look at first. After that, from your computer, send yourself a test email to your Cox email address to see if it comes through. Cox is like Comcast email addresses and they may take a few minutes to come through on the Blackberry.