hi if someone can please give me this invite i'll be really grateful
You're best bet is to checkout What.CD's intro site where they give you instruction on how to get an invite. Do you have the link? If not, I'll PM you it - let me know.
What.CD Staff are pretty cool and straight forward. Basically they give you a bunch of great links as resources, you study, take a test... and if you pass you're officially in.
Hope this helps... let me know about that link.