Registering nicks on a network is different from registering mIRC. Dig out the copy of the email from Khaled with your mIRC registration number and how to input it. In the event you didnt keep a copy of it in a safe place (tsk tsk) go to http://www.mirc.com/reglost.html

re your nickserv prob, if using the exact format, on the network you registered your nick on, doesnt work, i would try getting rid of the script you are using and see if that solves the prob... have seen a lot of users with probs from that one.