sorry to hear you are having some challenges,
since you did not mention what service you are using to host your website (we will assume wordpress) we can only guess at probable causes
first check your list of subscribers for your email -- probably will not be there -- so check for "unconfirmed subscribers" and you will probably find your email listed there
click on the email and you will be taken to more detail on that account -- if you hover over the little dot by the email type, it will probably indicate "bounced"
I have only worked with wordpress, (but there will likely be something similar with other web packages) so the next step is to check your plugins to determine if there is anything that conflicts with CK
hope this helps,