I've faced a DNS configuration problem at a hosting company, 1FreeHosting.com.
I don't know how to deal with the Nameservers and the associated IP addresses to insert "A", "CNAME", "MX", "NS", etc. They provided to me four Nameservers with IP addresses:
you have to login in the member area
click on " manage domain"
select your domain
change NS1.DNSOWL.COM with yours (ns1.1freehosting.com .... ns4.1freehosting.com )
save the change by clicking submit
you have to wait for dns to propagate