Outlook Express 6 E-mail Error Ox800CCC0D?

I have Win 98. Outlook 2000 would not send receive e-mail, so 6 months ago I downloaded Outlook Express 6. Everything worked great, but I had stuff in Outlook 2000, so I reinstalled it yesterday. It worked, and I could access my old files, but still would not send/receive, so pulled up Outlook Express 6 and then it would not send/receive. My ISP has not been able to help. I have checked and everything is entered correctly. This is the error message

The host 'pop3.wildblue.net' could not be found. Please verify that you have entered the server name correctly. Account: 'pop3.wildblue.net', Server: 'pop3.wildblue.net', Protocol: POP3, Port: 110, Secure(SSL): No, Socket Error: 11001, Error Number: 0x800CCC0D

Thanks for your help