how to manage a national team instead of a club?

i managed Woking(english club from their lowest league) on my iPod Touch 4g. i had emerged through all the obstacles and have win all the champions cup, euro cup, and also club world championship. so whats next to unlock the national team management.

i only have one country active, which is England. i regularly visit the "job search" screen. there is actually few countris that the manager's position is insecure.
also, some of them is available. i did apply for german and portugal once (when the status are available). but i dont get that job
i was ranked first in the hall of fame.

please could any suggestion or help may be really good enough for me