My first domain is not work

[mikail]

First, Hello Everyone

I have a problem and my english is not good.

Step by step I'll try to explain,

1- my server domain is " server.mikailcolak.com "
2- No problem connection of " server.mikailcolak.com " on internet
3- Have a problem of connection " mikailcolak.com or http://www.mikailcolak.com " on internet
4- email is working, example " info [{a|t}] mikailcolak.com " send and receive
5- i create sub domain w3.mikailcolak.com for testing i look working
6- but mikailcolak.com or http://www.mikailcolak.com not working

Please Help me friends, i will be crazy!

Thanks for attention and help.

and sorry my english...