might wanna re-check in the spam/trash folder , maybe your spam filters are just set too high , on the other other hand maybe your mail provider blocks em from some reason , try to get another activation code and this time just use this as email , anything@dontreg.com , after its sent just goto www.dontreg.com and input the user for example if it was "anything" then put that.. and it will just let you in (its a disposable email service,basicly for avoiding spam but usefull for some other stuff too)