Multidomain.. strange problem

Hi, I am having this issue.. before everything was working fine.. last weekend I create a new blog and this issue appeared-

I am using multdomain plugin so every blog I made, in my Multi site WP, has a unique domain,

micoachdevida.com - original blog
babibu.com.mx - site made on Nov 2
todopormishijos.mx - site made today for testing this issue purpose

todopormishijos.com - second site I made, had almost 6 months working right until yesterday..

I also have created test.todopormishijos.com an it is working..

the issue is .. if I try to visit
todopormishijos.com I get nothing .. just a blank page..

But for all others site.. I get the right response...

So I dont know what happened? Why that blog domain mapping stop working???

SO where it is done all domain mapping resolving process??
How May I proceed??

Thanks