simple whois shows the register is wildwestdomains.com. but since they are a reseller you may have to contact them to find out who exactly. Now also with the whois you got the name servers
Domain servers in listed order:
PARK9.SECURESERVER.NET
PARK10.SECURESERVER.NET
www.acecarsearch.com
goes to a splash page for
www.mynamespace.com, which is a known wild west reseller. Great we found out there is no real hosting setup, just the free one that comes with the site when you register it.
This gives you 2 options after getting the username and password from the registar.
One: find hosting and change name servers for new host
two: use the free starter page they give and setup stuff on there (not recommended due to price and other constraints)