I am using the Web Interface and ZCS 5.0 and I am getting "Error: Generic Test Failure" when I try to create an external POP account.

I'm trying to connect to mail.comcast.net.

I have several accounts and I think I've tried every combination of:
Username of Account: username and username@comcast.net (I believe it just supposed to be the just the username but I tried it anyway)
not encrypted and encrypted.

I still get the same message.

How can I get more information other then: "Error: Generic Test Failure" to find out what is failing and why?