Adding icloud mail

Hi,

I have been using icloud mail for a long period of time by using the mail client on my iPad. After a total reboot of my ipad (due to late ios version and interruption during the load process) I'm unable to add my iclud e-mail account. It say's "This account is alreday added on your iPad" even though I can't access my mail using the ios mail client. When I open my mail I directley come to the first page telling med to add mail client (icloud, Microsoft exchenge, Google, Yahoo!, AoI, Outlokk.com, other).

/Joakim