i fogot my nokia n8 password and i cant insert any other simcard in my 4ne

Hello Xp,

Did you already contact our support as asked by Ania in the thread you referred to?

Unfortunately the community cannot directly help you reset the Anti-theft lock.  

For alternative way to unlock your mobile, check also  the following post:
http://community.f-secure.com/t5/Protection-Safe/f-secure-mobile-password/m-p/11397#M2688