My Url points to Yola but my published site keeps disappearing-help

hi i am having some difficulty getting to publish my site an dgetting it to stay published,if that makes any sense.
i have a domain name (www.alcemi.net) and hosted by easyspace,managed to get that to point to the yola site.
over the weekend i managed to publish my site and began editing it-however.
when i checked just now, the url shows a page from easyspace saying the url has been registered but no sign of my yola site! i tried republishing the site but still im getting the same.
so, what am i doin wrong, can you help? i want to be confident that this is going to work otherwise im wasting my time,right?