after i regist my appleid, received the verify-email and veiry my apple-id,then i begin to appstore to install softers，when i login in appstore,it shows me that my appleid does't use before and need to login-check?

after i regist my appleid, received the verify-email and veiry my apple-id,then i begin to appstore to install softers，when i login in appstore,it shows me that my appleid does't use before and need to login-check, and i begin to check step by step，finally when i click 'go-on', it shows that 'unable to handle your request', i try many times and it does work, then i change the network-enviroment, change the DNS and it does work, how ?thks