TalkTalk E Mail set up problems

Does anyone have the same problem as me?, I cannot get my Primary E Mail set up on the Talktalk site, although I have managed to get 3 other accounts working.

I have deleted the account from all 3 of my devices iPhone and iPad as well as my Mac Book Pro.

I have just spent 21/2 hrs with TalkTalk on the phone and they have tried everything to get the account set up, but no luck. Is there anyone out there who can help?. I can't work out if it is a Talktalk problem or is there something on my Apple Devices which needs Tweaking ?.

This should be so simple, however it is not!.

I did set up 2 new accounts yesterday on the TT site and they were fine.

Error message is "unable to verify username or password"

Chris.